Taigu County Tongyuan Electric Equipment Co.Ltd., which owns rich experience in professional manufacturing couplers for transmission line of high voltage electricity below 750KV for more than ten years, can manufacture products which are made of cast iron, malleable iron, nodular cast iron, cast steel, and so on. Our company is also capable to supply cast fittings for producing automobiles and electric railway. With advanced technology and manufacture equipment, we can provide the customers with various customized cast products according to their blueprint or model.