... , is a highly professional manufacturer of single screw, Parallel Twin Screw & Barrel, Screw & Barrel For Extruder, Screw & Barrel For Injection Molding Machine, and all ... .05 mm – 0.10 mm, hardness HV950Special treatment: Carbide coating (screw flight) and bimetallic barrelScrew straight tolerance0.015 mm/mSurface roughnessRa 0 ...