Stainless steel tube is a hollow circular steel strips, which are widely used in petroleum, chemical, medical, food, light industry, mechanical devices and other industrial pipeline and mechanical components. In addition, bending, torsional strength is the same as light in weight, it is also widely used in the manufacture of mechanical components and structures. Also used in producing a variety of conventional arms, barrel, shells etc. http://www.sellsteels.com/stainless-steel/stainless-steel-pipe.html