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 numbers of the teeth is 21t, and the splines 15s. length is 226.5mm. it is used in the travel motor gearbox assembly. the other parts realted to this 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