... pickled,acid,polished,black4.shape:round,square, rectangle stainless steel welded pipe details:1) Sizes : 9.5mm, 12.7mm, ... steel : 304( 0Cr18ni9.0Cr17ni8)6) Process method: automatic shape, cold drawn, nitrogen protection7) Standard : Q/GBS1-2005, customers requests available8) ... , industrial instrument Type:stainless steel welded pipeSizes:O.D 9.5mm-219mm ; Square tube:OD10mm*10mm-150mm*150mm,Grade:304 ...