Yantai Yunsheng Petroleum Machine Fittings Co., Ltd.

Yantai Yunsheng Petroleum Machine Fittings Co., Ltd produce API approved sucker rod couplings, including Spray Metal coupling, T coupling,Sub coupling, Full size coupling and Slim Hole coupling,with the size range of 5/8", 3/4", 7/8", 1" 1-1/8". Materials is AISI 5140.All of our products are excellent in quality and low in price,which satified many foreign customers home and overseas. We are golden supplier of alibaba.com,with API 11B certificate and the best supplier you can trust in China. [Details]