 
Specifications:
Diameter: Φ 15mm up to Φ 300mm
Max.Length: ≤ 10000mm
1.Material: 38CrMoAIA
Nitriding treatment, Surface hardness: HV≥900
Nitriding depth: 0.5~0.8mm
2.Material of barrel inside layer: Tungsten alloy
Surface spraying, prolong life of screw
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