6AN (5/16") Standard Size. AN-6 (5/16") Black Nylon PTFE (TEFLON) Made Fuel Line:ID: 8 mm (0.315"),OD: 11 mm (0.433"). The 6 AN PTFE hose working temperature range: -100F to 500F (-73°C to 260°C). It is compatible with nearly every substance or agent used.
