... 3-1/2 EU J55 S13 coupling with sealing ring API 5CT Near Tianjin Port,fast delivery China famous brand 1 ... .API 5CT seamless tubing coupling and casing coupling2.ISO 9001:2008 3. Adopting high quality ... .05 J55,K55,N80Q,N801,L80,P110Casing Coupling4-1/2"STC127.00*158.755.23J55,K55,N80Q, ... !You are welcome to negotiate business with us!! Jinggong API 5 CT 3-1/2 EU J55 S13 coupling ...