... products and ingredients. Extruder screw design for 65/132 conical double screw barrelMaterial: 38CrMoAlA; SKD61; SKD11; 40Cr; 42CrMo; high quality ... head type etc. Extruder screw design for 65/132 conical double screw barrelscope of application : PVCwood-plastic., PE wood-plastic ... high Calcium pipe,50-300 high Calcium Profile,soft PVC sheet, PVCfoaming boardetc. PP,PE,ABS,PVC,raw material pelletzing ...