Yunsheng is the manufacturer offering API sucker rod coupling in Shandong China. All the rod coupling produced by API 11 B standard.These sucker rod coupling are very cost effective,including class SM sucker rod coupling, class T sucker rod coupling, Sub sucker rod coupling, Full Size coupling, Slim Hole coupling. They are available in 5/8, 3/4, 7/8, 1 and 1-1/8. Manufactured with high quality Carbon steel AISI 5I40 /4135 . If you have any interest in our sucker rod coupling, please feel free to contact us for further information!
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