ATL Racing Fuel Cells is the premier source for Sprint Car and Midget Fuel Cells for professional race teams. ATL Super Cell® 400 Series Fuel Bladders are Ultra-Lightweight Ballistic Nylon and are Thin and Forever Pliable for Easy Installation. ATL Super Cell® 400 Series Fuel Bladders are Extremely Lightweight, Yet Amazingly Durable. ATL Super Cell® 400 Series Fuel Bladders is the ONLY Repairable Bladder, Anywhere! ATL Super Cell® 400 Series Fuel Bladders Feature Internal Seams for Maximum Fuel Capacity, #12 AN (3/4) Front Outlet With Internal Pick-Up Hose Assembly.