The Moeller 305994-10 EPA Fuel Cap is a direct factory replacement for your portable fuel tank using the same components as the original cap construction. It is EPA and CARB approved and fits both pre and post-2011 Moeller and Tempo-style portable fuel tanks. An audible click signals that the cap is sealed on the neck fill and a tether secures the cap while refueling. An auto self-venting pressure feature vents tank above 5 PSI when center pop-up vent is in the open position. Positive vent closure for storage and transportation.