Product name:G.I Sockets Standard:British,American,Din Size:1/2"-24” Surface:hot dipped galvanized ,black,electric galvanized We ,Hebei BoNa Enterprise is a professional supplier of pipe fittings and steel pipes for more than 20 years .So that we can supply you good products with competitive price . Our main products are as followings : Malleable iron pipe fittings (size from 1/8"-6") Carbon steel pipe nipples & sockets (size from 1/4"-6") Seamless steel pipes (size from 1/8"-24") Welded steel pipes (size from 1/2"-24") If you are interested in our products please feel free to contact me .