Steel Tube manufacture standard: JIS, GB,DIN,ASTM,EN,AISI welded tubes 201/202/304/430/409L/ ... 316L Steel TubeManufacture Standard:JIS, GB, DIN, ASTM, EN, AISIwelded tubes,Thickness:1.2mmLength:6mOutside path:60mmFinish: 2B ... hairline, mirrorMaterial: AISI 201/202/304/430/409L/316LManufacture standard: ASTM A554Usage: construction , industry materials and so on.High quality, competitive ...