Screw Barrel 1.single screw 2.38CrMoAlA material 3.high speed screw 4.Nitriding process Screw BarrelZhejiang Titan Machinery Manufacture Co.,Ltd is ... layer thickness: 0.025-0.085mmScrew size: 45mm,65mm,75mm,90,110mm,120mm,150mm,180mm,200mmLength/Diameter ratio: ... can manufacture various kinds of screw barrels according to the customer’s requirement. Well Performance Screw Barrel For Plastic Extruder