Extruder screw design for 65/132 conical double screw barrel 1.Material:special alloy steel 2.Good customer service Extruder screw design for 65/132 conical double screw barrelspecification:35/76, 45/90, 45 ... Calcium pipe,50-300 high Calcium Profile,soft PVC sheet, PVCfoaming boardetc. PP,PE,ABS,PVC,raw material pelletzing,plastic pipe,plastic profile,and plastic sheet etc.