... 598 Size: 1/8 -4 stainless steel D coupler female Cangzhou Shengtong Stainless Steel Products Co. Ltd. is a high- ... kinds of valves and pipe fittings made of stainless steel, carbon steel and malleable iron, and we can also design ... valves, globe valves, gate valves, strainers, sanitary valve & fitting, quick couplings such as type A,B,C,D,E,F ... API, DIN, BS, JIS, GB standards an so on. Quick connectors