a.1"SH API Class T Coupling b.Lower price with higher quality ... .Small order is allowed Yantai Yunsheng Petroleum Machine Accessories, Co., Ltd , funded in 1997, presently is one of biggest enterprises producing ... /8, 3/4, 7/8, 1, 1-1/8.1"SH API Class T couplingA. Type: T B. Coupling diameter: 1 ... ) Two-way Cambered Protection SM Coupling OIL DRILLING EQUIPMENT, 1"SH API Class T Coupling