ReeFlo is an American based manufacturer of saltwater pumps. The difference in Reeflo's pumps is their use of low speed motors. These motors draw low watts, have a longer life and near silent operation. Unlike most all other aquarium pumps, Reeflo motors are rebuildable. They offer a rebuild service at their U.S. factory in Colorado. If you deal with Reeflo's customer service team you are dealing with one of three owners of Reeflo. Reeflo's Hammerhead / Barracuda Hybrid pump have conversion kits that allow you to switch between models thereby adjusting flow and watt draw (2 impellers are included). This increases the flow range allows you to adjust the pump to your systems needs. Ideal applications for this unit are aquariums 250-500 gallons. The Hammerhead / Barracuda Hybrid Pump is great for close loop reef systems and return pumps requiring high turnover. Features Quiet operation Aluminum motor 15' power cord Inlet/Outlet: 1.5" FNPT / 1.5" FNPT Dimensions (L x W x H): 14.20" x 8.33" x 7.54" 3-year limited manufacturer's warranty Flow Chart Head Pressure Hammerhead (GPH) Barracuda (GPH) 0' 6000 4300 4' 5500 3850 8' 4900 3333 12' 4450 2730 16' 3800 1810 20' 3000 600 24' 600 0 345 Watts 235 Watts