The Dynisco Extrusion Processors Handbook
TheDyniscoExtrusionProcessorsHandbook2nd editionWritten by:John Goff and Tony WhelanEdited by:Don DeLaney
AcknowledgementsWe would like to thank the following people for their contributions to this latest editionof the DYNISCO Extrusion Processors Handbook. First of all, we would like to thank JohnGoff and Tony Whelan who have contributed new material that has been included in thisnew addition of their original book. In addition, we would like to thank John Herrmann,Jim Reilly, and Joan DeCoste of the DYNISCO Companies and Christine Ronaghan andGabor Nagy of Davis-Standard for their assistance in editing and publication. For the figures included in this edition, we would like to acknowledge the contributions of DavisStandard, Inc., Krupp Werner and Pfleiderer, Inc., The DYNISCO Companies, Dr. HaroldGiles and Eileen Reilly.
CONTENTSSECTION 1: INTRODUCTION TO EXTRUSIONSingle-Screw Extrusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Twin-Screw Extrusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Extrusion Processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11SECTION 2: MATERIALS AND THEIR FLOWPROPERTIESPolymers and Plastics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Thermoplastic Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19Viscosity and Viscosity Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25Flow Properties Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28Elastic Effects in Polymer Melts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30Die Swell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30Melt Fracture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32Sharkskin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34Frozen-In Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35Draw Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36SECTION 3: TESTINGTesting and Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37Material Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40Density and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42Tensile Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44Flexural Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46Impact Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47Hardness and Softness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48Thermal Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49Flammability Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57Melt Flow Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59Melt Viscosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62Measurement of Elastic Effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64Chemical Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66Electrical Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66Optical Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68Material Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70SECTION 4: THE SCREW AND BARREL SYSTEMMaterials Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72The Hopper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75The Barrel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76The Screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79Screw Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83Screw Mixing Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87Breaker Plates, Screen Packs, and Gear Pumps . . . . . . . . . . . . . . . . . . . . . .92Screw Drive System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96Motor Size and Thrust Bearing Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
SECTION 5: THE DIE AND POST EXTRUSIONEQUIPMENTDie Design Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101Materials of Die Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103Die Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105Flat Film and Sheet Dies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107Blown Film Dies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108Pipe Dies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111Wire and Cable Covering Dies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113Profile Dies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115Extrudate Take Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116Cutting and Stacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118SECTION 6: EXTRUSION OPERATIONSStart Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119Process Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122Process Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127Shut Down Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130Purging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130Stripping and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133Reclaimed Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136Machine Setting and Running . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139SECTION 7: DEFECTS AND DEFECT FINDINGDefect Determination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143Minimizing Defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145Extrusion Defects and Causes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146Production Problems and Flow Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . .147SECTION 8: GUIDELINES FOR THE FOLLOWINGMATERIALSABS (Acrylonitrile-Butadiene-Styrene) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150HIPS (High Impact Polystyrene) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .159PA 6 (Nylon 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165PA 66 (Nylon 66) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175LDPE (Low Density Polyethylene) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183LLDPE (Linear Low Density Polyethylene) . . . . . . . . . . . . . . . . . . . . . . . . . .191HDPE (High Density Polyethylene) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .198PP (Polypropylene) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .206PMMA (Polymethyl Methacrylate) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .216PPVC (Plasticized Polyvinyl Chloride) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223UPVC (Unplasticized Polyvinyl Chloride) . . . . . . . . . . . . . . . . . . . . . . . . . . .234SECTION 9: USEFUL INFORMATIONSI Units Advice on Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245Unit Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .246Temperature Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251Thermocouple Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251Applications of Rheological Data for Extrusion . . . . . . . . . . . . . . . . . . . . . .254Material Property Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .260Glossary of Extrusion Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .262Book List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .284
LIST OF TABLESTable 1.Table 2.Table 3.Table 4.Table 5.Table 6.Table 7.Table 8.Table 9.Table 10.Table 11.Table 12.Table 13.Table 14.Table 15.Standard Abbreviations (Based on ISO and ASTM)for Selected Thermoplastics . . . . . . . . . . . . . . . . . . . . . . . . . . .17Common Abbreviations and Trade Names/Trademarks forExtruded Thermoplastics and Thermoplastic Elastomers . . . . .22Standard Tests Used forProperty Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39Moisture Content Limits for Extrusion . . . . . . . . . . . . . . . . . . .42Shrinkage (Mold Shrinkage) Values for SomeThermoplastic Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51Average Specific Heat and Heat Content forSome Thermoplastic Materials . . . . . . . . . . . . . . . . . . . . . . . . .52Glass Transition Temperatures (Tg) and MeltingTemperatures (Tm) for Some ThermoplasticMaterials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53Typical Thermal Properties of SomeThermoplastic Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55Comparison of Softening Temperatures forSome Thermoplastic Materials . . . . . . . . . . . . . . . . . . . . . . . . .56Typical Limiting Oxygen Index (LOI) Results . . . . . . . . . . . . . .57Typical Results from the UL 94 VerticalBurning Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58Suggested Temperatures ( C) and Loads (Kg)for MFR Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61Suggested Temperatures for HighShear Rate Rheometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63Suggested Drying Conditions for ExtrusionMaterials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74Heat Contents of Some Thermoplastic Materials . . . . . . . . . .116LIST OF FIGURESFigure 1.Figure 2.Figure 3.Figure 4.Figure 5.Figure 6.Figure 7.Figure 8a.Figure 8b.Figure 9.Figure 10.Figure 11.Figure 12.Figure 13.Figure 14.Figure 15.Figure 16.Figure 17.Figure 18.Figure 19.Figure 20.Figure 21a.Figure 21b.Figure 22a.Single Screw Extruder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Twin Screw Extruder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Gear Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Pipe Extrusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Blown Film Extrusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Sheet and Film Extrusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8Wire Coating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9Viscosity Curves for Some Commodity Thermoplastics . . . . . .27Viscosity Curves for Some Engineering Thermoplastics . . . . .27Capillary Rheometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29Die Swell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31Melt Fracture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33Melt Flow Rate Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59The Basic Extrusion Screw . . . . . . . . . . . . . . . . . . . . . . . . . . . .80Polymer Melting on the Extrusion Screw . . . . . . . . . . . . . . . . .80Flow Profiles in the Extruder . . . . . . . . . . . . . . . . . . . . . . . . . . .81Elements of an Extrusion Screw . . . . . . . . . . . . . . . . . . . . . . . .82Tapered and Parallel Screws . . . . . . . . . . . . . . . . . . . . . . . . . . .83Barrier Screw Designs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85Zero Compression Screw (Variable Pitch) . . . . . . . . . . . . . . . .86Standard Two Stage Screw for Venting . . . . . . . . . . . . . . . . . .86Dispersive Mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88Distributive Mixing Sections . . . . . . . . . . . . . . . . . . . . . . . . . . .88Dispersive Mixing Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
Figure 22b.Figure 23.Figure 24.Figure 25.Figure 26.Figure 27.Figure 28.Figure 29.Figure 30.Figure 31.Figure 32a.Figure 32b.Figure 33a.Figure 33b.Figure 34.Figure 35.Figure 36.Figure 37.Figure 38.Figure 39.Distributive Mixing Sections . . . . . . . . . . . . . . . . . . . . . . . . . . .90Static Mixer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91Breaker Plate and Screen Packs . . . . . . . . . . . . . . . . . . . . . . . .93Screen Changers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94Breaker Plate and Screen Pack Clamp Assembly . . . . . . . . . . .95Extrusion Gear Pump System . . . . . . . . . . . . . . . . . . . . . . . . . .96Flat Film and Sheet Dies (“T”, Coathanger) . . . . . . . . . . . . . .107Blown Film Die . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109Pipe Die . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111Multi-Layer Wire and Cable Die . . . . . . . . . . . . . . . . . . . . . . .113Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122Dynisco’s Pressure Gauges, Transducers andTransmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123Thermocouples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124Dynisco’s Melt Thermocouples . . . . . . . . . . . . . . . . . . . . . . . .124Dynisco’s ATC770 Pressure/Process Controller . . . . . . . . . . .129Polymer Flow Curves Used for theDetermination of τw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .255Shape Factors for Rectangular Dies . . . . . . . . . . . . . . . . . . . .256Polymer Flow Curves Shown as Viscosityvs. Shear Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .257Flow Through a Die for a Newtonian Fluidand Polymer Melt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .258Shear Rates in a Die for a Newtonian Fluidand Polymer Melt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .259
1 SINGLE SCREW EXTRUSIONTWIN SCREW EXTRUSION EXTRUSION PROCESSES SAFETY SINGLE SCREW EXTRUSIONExtrusion may be defined as a process for making a product (an extrudate) byforcing a material through an orifice or die to form a shape, or alternatively,the production of finished, or semi-finished products, using an extruder.Scope of the HandbookThis book will be mainly concerned with the extrusion of thermoplastic products because of their importance in extrusion processes. Thermoplastics areby far the largest group of plastic materials extruded; approximately 65% of allplastics pass through an extruder. As the most popular type of extruder is thesingle screw machine, this book will mainly concentrate on processes basedon that type of machine. Single screw machines are the most popular becausethey are relatively simple, cheap and easily give a continuous output.Extrusion and ThermoplasticsIn extrusion of a thermoplastic, heating first softens the material so that it canbe shaped. The extrusion machine, or extruder does this process. This heatsoftening is called by various names, such as ‘plastication’, ‘plasticization’ or‘thermal softening’. Most extruders are single screw machines. It is the screwwhich forces the material towards, and then through, the die. Shape is imparted by the die, and/or by post-extrusion forming, and then the product is set toshape by cooling it while maintaining its shape. The equipment that does thisis called the post extrusion equipment, while the whole system is called anextrusion line.Extruder ClassificationExtruders may be classified by three figures, for example, 1-60-24. The firstnumber states how many screws the machine has, the second number specifies the screw diameter in millimeters (mm) and, the third number specifiesthe effective screw length as a multiple of the screw diameter. In the examplegiven therefore, a single screw machine is being described that has a screw ofdiameter 60 mm and a length of 24 screw diameters (that is, a L/D ratio of24/1).Machine ConstructionA cut-away drawing of a simple single screw machine is shown in Figure 1.This shows the arrangement of the different parts of the machine. The screwand barrel are the two units that interact to convey the plastic material, meltthe material and then force it through the die. The electric motor drive unit andgearbox rotate the screw at a predetermined speed. Temperature controllerssection 1: introduction to extrusionSECTION 1:INTRODUCTION TO EXTRUSION
2are connected to heating/cooling elements on the barrel to hold the temperature at the set-point temperatures. The ability of the screw and barrel assemblyto extrude a given material is dependent on the characteristics of the plasticsmaterial, the characteristics, or construction, of the screw and barrel, and theconditions under which the system is operated.HopperGear BoxHeatersBarrelScrewDieCooling FansDrive MotorFigure 1. Single Screw Extruder (courtesy of Dr. Harold Giles)Post Extrusion EquipmentOnce the extrudate leaves the die it can either be set to the shape to be produced or have its shape altered and then set to shape. The equipment thatdoes this is called the ‘post extrusion equipment’ or the ‘haul off’ and in termsof size it is usually far larger than the extruder. One reason is that plastics takea long time to cool. This cooling process often determines how fast the linewill operate.Products of ExtrusionThe products of extrusion include: Feedstock for Other Plastics Processes: Extruders are widely used as compounders, or mixers. The output from an extruder compounder is granulatedor chopped to form the feed for another process, such as, injection moldingor extrusion Plastic Film: This is usually used for packaging or sealed into bags Plastic Pipe: Used for gas, water, drains, etc. Plastic Tubing: Used for hose and tubing for automobiles, laboratories, etc. Plastic Insulated Wi
SECTION 7: DEFECTS AND DEFECT FINDING . Co-Extrusion Co-extrusion is a process where two, or more, melt streams are combined in a die to produce an extrudate formed from two, or more, materials. The process is now associated with thermoplastics materials although it was first practiced 2
USA Email infoinst@dynisco.com Dynisco Europe, GmbH Pfaffenstr. 21 Phone 49 7131 2970 74078 Heilbronn Fax 49 7131 297 166 Germany Email dyniscoeurope@dynisco.com Dynisco China Building 7A, Phone 86 21 34074072819 No. 568, Longpan Rd Fax 86 21 34074025 Malu, Jiading Email dynisco.sh@dynisco.com 201801 China
May 02, 2018 · D. Program Evaluation ͟The organization has provided a description of the framework for how each program will be evaluated. The framework should include all the elements below: ͟The evaluation methods are cost-effective for the organization ͟Quantitative and qualitative data is being collected (at Basics tier, data collection must have begun)
Silat is a combative art of self-defense and survival rooted from Matay archipelago. It was traced at thé early of Langkasuka Kingdom (2nd century CE) till thé reign of Melaka (Malaysia) Sultanate era (13th century). Silat has now evolved to become part of social culture and tradition with thé appearance of a fine physical and spiritual .
On an exceptional basis, Member States may request UNESCO to provide thé candidates with access to thé platform so they can complète thé form by themselves. Thèse requests must be addressed to esd rize unesco. or by 15 A ril 2021 UNESCO will provide thé nomineewith accessto thé platform via their émail address.
̶The leading indicator of employee engagement is based on the quality of the relationship between employee and supervisor Empower your managers! ̶Help them understand the impact on the organization ̶Share important changes, plan options, tasks, and deadlines ̶Provide key messages and talking points ̶Prepare them to answer employee questions
Dr. Sunita Bharatwal** Dr. Pawan Garga*** Abstract Customer satisfaction is derived from thè functionalities and values, a product or Service can provide. The current study aims to segregate thè dimensions of ordine Service quality and gather insights on its impact on web shopping. The trends of purchases have
1.2 Understanding the Extrusion Process A good understanding of the extrusion process is necessary to solve extrusion problems efficiently. It is recommended for the reader new to extrusion to take classes covering the material characteristics of plastics,typical features of extrusion machinery,instrumentation
TSI Part # T-Slots Part # 80/20 Part # Descripon Type Series Thread Length Recommended Fasteners Picture Bin Loca:on TSL-650000 650000 1010-S 1″ X 1″ T-Slo.ed Extrusion Extrusion 10S EXTRUSION RACK TSL-650002 650002 1020-S 1" X 2" T-Slo.ed Extrusion. Extrusion 10S EXTRUSION RACK
