Beat the Evaporative Fuel Nozzles and top off your tank with relative ease with this lightweight, 1/8” thick, credit card sized tool. Durable ABS plastic prevents damage to the paint finish on your fuel tank. Unique teardrop shaped cut-out allows sliding over gas nozzle to depress and hold back the EFN boot while adding fuel to your tank. Won't slip off either. Works for filling gas cans too. Even if you don't live in a state with these booted nozzles, sooner or later you'll need one of these. Fits easily in your wallet, jacket pocket or tank bag. Prevents fuel filling frustration. 3.3"×2.2".