These 800 lb ballast bags are designed to be filled with water to displace the hull in any boat. The results are a better wakeboard wake or wakesurf wave. The compact design and flexible material means it will fit just about anywhere. Multiple massive 1″ fill and drain ports will allow this bag to be integrated into any factory ballast system when matched with the correct fittings. Use an adapter to fill it with a portable pump or install a completely new ballast system and use it that way.