Dear Customers, Nowdays, Stainless steel Square pipe is an economical cross-section steel and an important product in the steel industry. It can be widely used in life decoration and industry. Many people on the market use it to make stair railings, window guards, railings, furniture, etc. Two common materials are 201 and 304. Stainless Steel Square pipe is a section hollow long steel , which Stainless Steel Welded Round Tube for 200 300 series