Marine Metal Products Bubbles Top Combo with Bubble Box Portable Air Pump Pack turns any 5 - gallon bucket into an instant live well. It"s a universal 5-gallon bucket lid with a built-in aerator that can run up to 40 hours on a single set of 2 "D" batteries. What"s more, its hinged top door folds out to double as a cutting board with tabs for fishing accessories. The tank-tested aerator pump works for both fresh and saltwater and has a weighted air stone and airline-grade silicone tubing for maximum airflow. UV-treated.