Shanghai DE Mechanical Components Co., Ltd. is a Gear, Hydraulic Valve, Aluminum Castings manufacturer that enjoys great reputation in China. Our product range includes Helical Gear, Bevel Gear, Spur Gear, Double Helical Gear, Brake Valve, Operating Valve, Multi-Port Valve, Pressure Relief Valve, Aluminum Casting, Gasket, Roller and other Components. ISO, GB, API, EN, JIS, BS, EN Certificated. Materials ASTM 4140, ASTM 1045, ASTM 4340 etc.