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 ring gear is used for the final drive in excavators. other parts in this final drive is also available. the gear may fit to other machines, please refer to the part number as well as the ps to check. the shipment can reach to most of the countries of the world, please contact us if there is no option for your destination..syi