... More than 20 years experience in special fastener field Name: copper pipe fitting Ability for the material of this kind of fitting ... 4.8,5.6,6.8,8.8,9.8,10.9,12.9,etc Carbon steel Gr.B,Gr.C ... surface finish: Electroplate Zinc plated(while,colour,dacroment),Nickel plated,copper plated,gold plated,chrome(3+Rohs &6+ ) plated,anodic ... for exporting so that you couldavoid lots of risks. copper pipe fitting