SJZS PVC 45 plastic extrusion Conical Twin Screw Barrel 1.Materials:38CrMoAIA,42CrMo,SKD61 2.Application:PVC,PE,PP 3.Depth of nitration case ... years Bimetallic : much longer lifetime Conical Twin Screw Barrel Diameter 45/90-92/188mm Min. Order 1 set Materials 38CrMoAlA(JIS ... SACM645)42CrMo(JIS ACM440)SKD61 Discount Available Application PVC PE PP… Payment Term T/T , L/C Heat- ...