Specification: Diameter:φ45/2-φ250/2 L/D ratio:16-40 The compression ratio of screws can be designed according to different raw material and products. Application: PVC wood-plastic, PE wood-plastic, Ultra-high polymer board, 1/2 high Calcium buckle, 50-400 high Calcium pipe, 50-300 high Calcium Profile, soft PVC sheet, PVC foaming board etc. PP, PE, ABS, PVC, resin recycling, plastic pipe, plastic profile and plastic sheet etc.