... 2 Wall thickness: 0.4mm - 2.5mm stainless steel u tube/pipe description: 1) Standard: JIS, AISI, ASTM, DIN2) Outside diameter: 6mm ... to 127mm 3) Wall thickness: 0.4mm - 2.5mm 4) Material: 201,202,301,304,304L,321,316,316L,4305 ... : mirror polish, satin finish6) Application: for railing system7) Packing:every tube is sleeved in plastic bag individually stainless steel u tube/pipe