Product Description Product Description S-flex coupling, , 1. The couplings have 2 types of flanges J and S, their flanges are bored-to-size and manufactured for a slip fit on standard shafting. Available from stock in a wide range of shaft sizes. 2. Non lubricated, maintenance free, easy and quick installation. 3. NBR, Urethane elements. 4. … Continue reading China Professional 8j Sureflex Rubber Coupling with Two Flange for Motor Transmission flange coupling