N/a manufacturer / supplier in China, offering ISO9001 Certified Powder Metallurgy Sintering 8 * 16 * 11 Iron-Based Spherical Oil Bearing, Powder Metallurgy 36mm 1: 19.2 Gear Box Auto-Parts Motor Speed Reducer Gearbox, High-Performance and Durability Support OEM Custom Speed Ratio 1: 19 Powder Metallurgy Power Transmission Speed Reducer Planetary Gearbox and so on.