... like hardness tester, tensile strength tester, electronic balance, all gauges, and calipers. Our quality system already passed ISO9001 approval, which ensure ... our quality consistence. Powder metallurgy, low noise, and low costMaterials: iron, copper and bronze, Iron+Bronze optional, can be spherical or ... 1.5~50mm OD: 4~60mm, Special dimensions for Iranian and Indian market like 6.32*12.8(S)*8.8, 8 ...