... , Roughness:Ra1.0, The seal diameter need to polish, Ra0.4, The pinhole,procity or others on the surface is unallowed ... .Leak test with 17kg/cm2, 15minutes without leaking,12pcs reamining holes, 12pcs counterbores, Tolerances are +/-0 ... Automobile air conditioner parts, Machinery parts and others parts2.The typical products are scaffold fittings, template parts, railway fittings ...