stainless and seamless tube Material: 304, 304L, 310S, 316L, 317L, 321, 347, and So on. Seamless and Stainless Steel Tube1) Material: 304, 304L, 310S ... : OD (3.18-219)mm*WT(0.5-16)mm.4) Polishing: 180#, 240#, 320#, 400#, 600# etc.5) OD Tolerance ... , Boiler Heat-exchanger,8) Packing: Wrapped up by plastic films with woven bag outside in wooden case.