... steel 2.Good customer service Extruder screw design for 65/132 conical double screw barrelspecification:35/76, 45/90, 45 ... to different products and ingredients. Extruder screw design for 65/132 conical double screw barrelMaterial: 38CrMoAlA; SKD61; SKD11; 40Cr; 42CrMo; ... type, multi head type etc. Extruder screw design for 65/132 conical double screw barrelscope of application : PVCwood-plastic., PE ...