... Description We offer accessaries of screw and barrel, screw and barrel tips, screw barrel parts, feed screw barrel, screw barrel for injection molding machine ... Ntriding treatment, surface hardness: HV>900 Nitriding depth:0.5-0.8 Material: special stainless steel, quenching treatment, ... products and high corrosion plastic procession, prolong life of screw. 2.Suitable plastic material: PP, PE, ...