For coolers rated from 4,000 to 8,500 cfm (cubic feet per minute) using 8" or 12" Rigid Media. Includes mesh pump basket, mounting bracket, and pump hose extension. Auto-reset thermal overload protection. Built-in screened inlet in the base. "Low level" design, meaning that even if the water level in the cooler drops to as low as 1/2", it will still pump water without drawing air. Removable baseplate for easy removal of debris that might clog the intake. Corrosion resistant shaft. Grounded plug.