... ,316L,304L,316,321,310S,etc 3)Thickness: 0.5mm-20mm 4)Length: 1m-12m Welded Stainless Steel TubeMaterial Grade 304 ... -2002, GB14976-2002,ect.Outer Diameter 13.7-2000mmThickness 0.5-20mmLength 1m -12m or as customers' requestPolish 180G, 320G, 400G ...