... Alloy steel conical twin screw barrel for extruder machineSpecification:35/76, 45/90, 45/100, 50/105, 51/105, 55/110, 55/120,58/ ... head type etc.scope of application : PVCwood-plastic., PE wood-plastic,,Super high polymer board,1/2 high Calcium buckle ... ,PVC,raw material pelletzing,plastic pipe,plastic profile,and plastic sheet etc.Technical ParameteSCREW1) Nitride Depth: 0.55-0.7mm2) Nitride Hardness ...