Min. Order Reference FOB Price
1 Piece US$2.00-48.00 / Piece
Product Description
Product Description Polished rod couplings are designed for connecting of the polished rod to the top rod of the string. Contrary to rod couplings, polished rod couplings have a female cone that eliminates the coupling twist-off in the course of operation. 1. Standard: API Spec 11B 2. ...