... in special fastener field Name: copper pipe fitting Ability for the material of this kind of fitting: Grade 3.6,4.6,4 ... ,etc Carbon steel Gr.B,Gr.C,Gr.D,Gr.36,Gr.58,1010,1015,1016,1020,1045,etc Alloy steel ... for exporting so that you couldavoid lots of risks. copper pipe fitting