... Steel Tube welded2.Standard: JIS, GB, DIN, ASTM, EN, AISI3.Materials: AISI 201, 202, 301, 304, 304L, 316, 430, etc.4 ... -3.0mm, Other specifications are welcome from your request.5.Finishing: annealed, pickled, polished inside and outsidegrit: 2B(Mill Finish), 2D ...