N/a manufacturer / supplier in China, offering 1: 27 Two Layer Planetary Gearbox 36mm Transmission Gear Box for Electric Sweeper, Factory Price Gear Box 36mm Speed Ratio 51 Planetary Gearbox Speed Reducer, Powder Metallurgy Sintered OEM Power Tool Spare Parts Speed Ratio 1: 4.75 Pg16 Single Micro Planetary Gearbox Accessories and so on.