ASTM A554, A269, A249, A270. AISI 201,202,304,304L,316L,409L,430. Surface: 180#,400# Type: stainless steel welded tubeShape: round, square, profiled, U tube, etcGrade available: 304, 304L, 316/316L, 409L,430, etc.Size available: diameter from 6mm to 254mm, thickness from 0.5mm to 6 mmFinish: mirror, hairline, etcStandaard: A269, A554, A270, A249, etc welded tube