Fresh Water Pump; Aqua King ™ II Standard 3.0; Diaphragm Pump; 3 Gallon Per Minute; 55 PSI; 8.2 Inch Length x 4.9 Inch Width x 4.1 Inch Height; 12 Volt DC; With Thermal Overload Protection; With Two Each 1/2 Inch Hose Barb Fitting The Shurflo Aqua King II Junior and Standard Fresh Water Pumps' design was created with unique over-molded Single-piece diaphragm and internal by-pass [3.0 version only], assuring long life and top performance in all plumbing systems. These fresh water automatic demand pumps are quiet and can run dry without damage. Type: Diaphragm Voltage Rating: 12 Volt DC Flow Rate: 3 Gallon Per Minute Pressure Rating (PSI): 55 Pound Per Square Inch Material: Polypropylene Length (IN): 8-3/16 Inch Width (IN): 4-7/8 Inch Height (IN): 4-1/8 Inch With Thermal Overload Protection: Yes