Magnum Bait StationA(R) Replacement AeratorThis replacement aerator connects to the lid of any Frabill Magnum Bait Station model. The secret of these bait coolers is that the installation port for the aerator is integrated directly into the lid. Keep bait lively and fresh with one complete system that's easy to use and easy to open. This replacement aerator installs in just seconds to begin pumping in oxygen, instantaneously turning your cooler into a live well. Features:Fits any size Magnum Bait Station coolerRuns on a 12V adapter (included) or two D batteries (not included)Easy to install