Browse similar products RUBBER MACHINE; I. Name: Rubber Extruder, Cold Feed Rubber Extruder. II. Features: 1. Front Barrel: Outer barrel is made of high quality carbon steel; Inner bushing adopts 38CrMoAlA high quality nitriding steel, quenched and nitrogen treatment, surface hardness HRC65-70, hard layer depth 0.5-0.7mm; Bushing outer diameter of the ring is formed