SJZ65 Twin screw and barrel 1.Main used for the extruder convey, most important part 2.Material:38CoMoLAIA,coating alloy 3.CE Conical twin screw and barrel1.The SJZ series screw and barrel,mainly ... :The screw is via the heat treatment,nitriding treatment,high-frequency quenching,Spray-coating the bimetallic layer. 4.Picture for reference: SJZ65 Conical twin screw and barrel