... :special alloy steel 2.Good customer service bimetallic conical twin screw barrel for WPC profile production specification:35/76, 45/90, 45 ... type, multi head type etc.scope of application : PVCwood-plastic., PE wood-plastic,,Super high polymer board,1/2 high Calcium ... -300 high Calcium Profile,soft PVC sheet, PVCfoaming boardetc.PP,PE,ABS,PVC,raw material pelletzing,plastic pipe,plastic profile,and ...