Cold Drawn Stainless Steel Seamless Tube, polished, ASTM A312, A269, A213,A 270, etc. TP304, TP304L, TP316, TP316L, 321. Cold Drawn Stainless Steel Seamless TubeFeatures:1) O.D.: 6 - 219mm2) W.T.: 0.8 - 13mm4) Material: 304, 304L, 316, 316L, 321, et 321, etc.5) Standards: GB, ASTM/ASME, JIS, DIN6) Applications range: for use in the petroleum, smelting, foodstuff, power,papermaking, chemical, ...