... 3. Short lead time. Iron sintered fan bushes for electric fans and other motors, can replace GKN or MSP product, stock ... tester, tensile strength tester, electronic balance, all gauges, and calipers. Our quality system already passed ISO9001 approval, which ensure ... quality consistence. Powder metallurgy, low noise, and low costMaterials: iron, copper and bronze, Iron+Bronze optional, can be spherical ...