... , forging, casting,3diameter0-120 mm,4length0-600 mm5tolerancecan arrive at 0.004 mm6finishzinc plating ,nickel plating , tin plating ,chrome plating,gold ... spray test , no red rust10instrumentHexagon CMM , 2.5D Imaging Device , Height Gauge ,Projector, calliper ,micrometer,vernier caliper, thread gauges , plug gauges, pin ...