... standard: JIS, GB,DIN,ASTM,EN,AISI welded tubes 201/202/304/430/409L/316L Steel TubeManufacture Standard:JIS, GB ... 2B (Mill Finish), bright, satin, hairline, mirrorMaterial: AISI 201/202/304/430/409L/316LManufacture standard: ASTM A554Usage: construction , industry materials ... quality, competitive price and fast delivery.Packing: Every tube is sleeved in plastic bag individually, and then several tubes ...