Profession to win the trust  Devotion to win the heart

Yantai Yunsheng Petroleum Machine Accessories Co. since founded in 1997 has been specialized in manufacturing sucker rod coupling, and we have passed ISO9001:2000 and API Spec 11B certification. Moreover, as we are the directly professional manufacturer of API sucker rod coupling, we have enough room to make competitive and discount price for our customer, and our sucker rod coupling are available in all types and sizes and enjoy good reputation all the time.

Moreover, we could manufacturer sucker rod couplings according to customer's request. So if you are interested in any of our sucker rod couplings or have any request, pls feel free to contact us for further information. We'll be more than pleasure to give you our best service all the time.

             Go forward,with great courage,reach a new point

Yantai Yunsheng Petroleum Machine Accessories Co. Ltd., founded in 2005, is a professional manufacturer of API Spec 11B Sucker Rod Couplings, including Spray Metal coupling, class T coupling, Sub OD coupling, with various type of Full size, Slim Hole, Over Size, with Big Chamfer, with Wrench Flat, with Bidirectional Cambered Surface Protection, etc., and the thread size are available at 5/8", 3/4", 7/8", 1", 1-1/8".  Owning world top level equipments and technicians, the monthly production capacity is more than 20,000pcs.  All of our couplings are excellent in Quality and reasonable in Price, and the production & inspection are being done fully in accordance with API Spec11B standard.