we supply spare parts for heavy equipment, which are mainly used on engine, hydraulic & electronic systerm, and undercarriage, covering almost the whole machine. excavator spare parts including bearings, gears, seal kits, engine parts, motors, pumps, solenoids, valves, etc. the dimensions of the planetary gear is 37 teeth, od152mm, thickness 33.8mm (±0.5~2mm). it is used for the final drive in the excavators. the related parts in the final drive as well as the whole machine are also available, please contact us if any need. the shipment can reach to most of the countries of the world, please contact us if there is no option for your destination..syi