Features:- 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.Specifications:- External dimensions are the same for all 3 models.- ISO 15083 standard requires the following minimum performance, - at a 1 m height :- Boat &