For coolers rated from 4,000 to 8,500 cfm (cubic feet per minute) using 8" or 12" Rigid Media. For use with MasterCool and Artice Circle coolers. 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.