... ,extruder machine equipments screw barrel,bimetallic screw barrel for plastic machinery, high wearing resistant screw cylinder, ... bimetal screw cylinder, ultra wearable screw cylinder , spare parts for injection molding machinery,screws barrels of plastic machinery,bimetal ... screw barrel, components for injection molding machine Material:38CrMoALA(JIS SCM645),W6Mo5Cr4V2 ...