stainless and seamless tube Material: 304, 304L, 310S, 316L, 317L, 321, 347, and So on. Seamless and Stainless Steel Tube1) Material: 304, 304L, 310S, 316L ... , 317L, 321, 347, and So on.2) Standards: ASTM/DIN/JIS/EN3) Size: OD ... , Medical Equipment, Boiler Heat-exchanger,8) Packing: Wrapped up by plastic films with woven bag outside in wooden case.