Rugged ABS construction. designed for intensive use on board commercial/work boats. Corrosion and chemical housing resists impacts and hull pounding. Parabolic chamber design moves water around housing : this helps cool the motor. decreases power consumption and prolongs motor life. High-efficiency permanent magnet motor utilizes composite brushes and lubricated bearings. Easy installation : the mounting bracket can be installed in a variety of positions and the pump mounts to the bracket with a click-lock feature. Easy maintenance : the powerhead. pump chamber and mounting bracket are detachable for easy cleaning.