stainless and seamless tube Material: 304, 304L, 310S, 316L, 317L, 321, 347, and So on. Seamless and Stainless Steel Tube 1) Material: 304, 304L, 310S ... wall thickness7) End Application: Petroleum, Chemical, Automobile, Medical Equipment, Boiler Heat-exchanger,8) Packing: Wrapped up by plastic films with woven bag ...