Pellet extruding screw elements 1.Vacuum nitriding and Bimetallic 2.Special alloy spraying on the screw thread 3Wear-abrasion Pellet extruding screw elements we can make any specification of extruder screw barrel and injection screw barrel for Cincinnati battenfeld,Haitian, Demag, Engle, Klaus-maffei, Nigro bossi, arburg,NPM, BOY, Husky, Fanuc, billion, Sumitomo, Nippon Steel, Toshiba, Nissei, ...