... :2008&BV,meet RoSH,reach Stainless Steel Shaft ,metal machine shaftQuality control: Dimensional check througout the production ... projector, microscope, roughness tester, precision, length of the detector, the high degree of precision instrument, hardness gauge,various ... slot card, the inner hole caliper and other sophisticated detection equipments. Product material: brass,bronze,cooper,iron,aluminium ...