Rule 3700Heavy duty construction for both commercial and pleasure boat use; known for trouble free operation and reliability. 1-1/2" (38mm) discharge outlet. 12 Volts DC unless noted.Features: Fully Submersible Easy clean snap lock strainer Silent and vibrationless operation Anti-airlock protection Compact, efficient long life motor Ignition protected No burn-out when run dry Rust and Corrosion protection Used by leading boatbuilders worldwide marine grade blocked wiring WARNING: This product can expose you to chemicals including FORMALDEHYDE (GAS) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov. Specifications: Gallons Per Hour: 3700 GPH Operation: Non-Automatic Outlet Size: 1-1/2" Volts: 12v Type: Electric Box Dimensions: 7"H x 8"W x 11"L WT: 6 lbs UPC: 042237083357 Owner&';s Manual (pdf)