Steel Tubes manufacture standard: JIS, GB,DIN,ASTM,EN,AISI welded tubes 201/202/304/430/409L/316L Steel TubesManufacture Standard:JIS, GB, DIN, ... ASTM, EN, AISIwelded tubes,Thickness:1. ... is sleeved in plastic bag individually, and then several tubes are packed by weaving bag, which is seaworthy 304 Steel Tubes