Rule 800 Bilge pump 20F, 3/4" outlet, 12 volt. 800 gallons per hour. Features exclusive Rule moisture tight seals. Compact, efficient, maintenance-free positive snap lock strainer base. Totally submersible, silent running, vibration less, ignition protected, water-cooled motor. Anti-airlock features, no burnout when run dry. Stainless steel shaft. The base measures 2 "1/2" x 2-3/4".