... 3)class T & UHS(SM) 4)Excellent quality& low price Company IntroductionOur company ,funded in 1997, presently is one of ... Industrial Park,beautiful seashore city-Yantai, to north neighbouring Yantai Port, to south next to Yantai Airport, with beautiful scenery, comfortable ... metal coupling for anti corrosion. Dimensions and tolerances conform to API Specification 11B. PRODUCT LINE We produce the whole ...