screw and barrel:Bimetallic barrel/cylinder We supply various tyes of screw ... barrels according to customer's requirement. Product name: Bimetallic barrel/cylinderKey word:screw barrel,bimetallic screw barrel,extruder screw barrel,screw barrel for ... molding machine,twin screw barrel,screw barrel for extruder machine,screw barrel for injection molding machine.Material:38CrMoAlA,SKD11,SKD61,HPT2B,high ...