... parts, 2.CNC proscess 3.silica casting 4.allowance:+/-0.05mm 5.China, Cangzhou Construction Machinery Parts precision casting,silica ... Treatment:Zinc, Nickel, Chrome, etc.Accuracy:Accuracy of Machining :+/-0.05mmAccuracy of Grinding :+/-0.05mmSurface Roughness :Ra0.8 Application :Automobiles, Motorcycle, Mechanical ... amount of samples machining parts, CNC process, silica casting, +/-0.05mm,China