Length: 4 inch Diameter: 2 inch Material Type: 304 general purpose stainless steel Finish: Unpolished (Mill) High Strength, High Corrosion Resistance, Easily Welded or Formed 304 stainless steel is a general-purpose alloy that can be easily welded or formed. It has a high resistance to heat and corrosion, and will respond well to hardening by cold working. Made up of 8 percent nickle and 18 percent chromium, it has good oxidation resistance when used in temperatures up to 1,600°F. This 304 stainless steel meets ASTM A276 specifications.