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 ... , aviation, boiler heat-exchanger and other fields7) Packing: Knitted package in bundles or wooden case, or as per customers' requests. Cold Drawn Stainless Steel Seamless Tube