Seaflo 600gph Non-clog Submersible Bilge Pump 600 GPH 600 GPH cartridge aerator livewell pump Transom cutout hole: 1-1/16" (27mm) Fills your livewell / bait tank with clean, oxygenated water to keep your catch healthy Hose Outlet: 3/4" (19mm) Voltage: 12V DC