PP,PE,PVC,PET,ABS,PPR for Plastic Extruder Machine Conical Twin Screw and Barrel material: bimetallic layer ... PP,PE,PVC,PET,ABS,PPR for Plastic Extruder Machine Conical Twin Screw and Barrel Zhejiang Bohai Conical ... /T , L/C ,Western UnionSurface RoughnessRa0.4umDelivery Term20-30 working daysScrew Straightness0.015mmPort DepartureShanghai/NingboAlloy HardnessHRC65-75Min. Order1 ...