Straight Line Sumo Max Open Bow 500 SacThe large Straight Line Sumo Open Bow Ballast Bag gives you 500lbs. of additional weight hidden in the bow of your boat. Straight Line Sumo Max Open Bow 500 Sac This bag conveniently hides below the seats in the bow while adding 500lbs. for a cleaner, bigger wake. The Straight Line Sumo Max Open Bow Ballast Bag gives you 500lbs. of additional weight hidden underneath the seats in the bow of your boat. Straight Line's biggest Sumo Max Open Bow Bag