Sumo proudly introduces the innovative Max Flow system. Together, the all new Sumo Max Flow Pump and Sumo Max ballast bags make Sumo the fastest filling ballast system in the industry! Equipping your boat with this system means less time filling and more time riding your massive new wake!All Sumo Sacs are easy to use, durable and convenient. They are designed to work as a plug 'n' play option with your factory ballast system or on deck with Sumo pumps.Fits inside or on top of playpen style bows.Specs:675 Lbs.50" x 44" x 8"1 Max Flow Link3 x 1" NPT