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 vavle is used at the hydraulic oil pipeline to make sure the oil flowing in one way only and prevent it from flowing backward. it is also fitted to some other machines referring to the part number. the shipment can reach to most of the countries of the world, please contact us if there is no option for your destination..syi