Straight Line Sumo Max 650 (Grey) Ballast Bag For 2017, 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! Camping World Straight Line Sumo Max 650 (Grey) Ballast Bag