Part Specifications ——————-Tube Diameter 3.” O.D. Length 5 feet Tube Thickness .65″ (1.65mm) Ideal for building custom exhaust systems, headers, downpipes, intercooler piping, etc…. T34 Stainless Steel is a non-magnetic alloy that possesses very high chromium and nickel content, making it much more capable of withstanding acidic, high heat and corrosive conditions than regular (mild) steel. Note: Overall length tolerance = #/-2″