... between 1.5~10Out Diameter50mm-1500mmProcessingPrecision hot and cold forging, casting, precision machining and roll forming.MachiningTurning , milling , drilling ... StandardISO, GB, JIS, DIN, AGMA and non-standardSurface TreatmentCarburizing, hardening and tempering, Nitriding, high frequency treatment, ... our well-trained and proffesional engineer and staffs.4. Special discount and protection of sales ...