... :2B,BA,HL,NO.1,8K,etc SpecificationsStainless Steel Pipe: 1.Material:201,202,304,316L,430,etc 2.OD:6mm-50mm ... Thickness:0.3-3.0mm 3.Surface:Mirror,Satin/HL NameStainless Steel pipeStandardASTM ... A554, A249, A269 and A270, A312Material Grade201 ( Ni 0.8%),202 (Ni 3.5%~4.5%),301(Ni 5%)304 ...