... ,PVC,PET,ABS,PPR for Plastic Extruder Machine Conical Twin Screw and Barrel material: bimetallic layer PP,PE,PVC,PET ... ,PPR for Plastic Extruder Machine Conical Twin Screw and Barrel Zhejiang Bohai Conical twin screw barrelDiameterΦ25/53,35/77, ... -1050HVPackingWrapped up by film in woodenNitride Brittleness≤Grade OnePayment TermT/T , L/C ,Western UnionSurface RoughnessRa0.4umDelivery Term20-30 working ...