Needing that extra bit of weight to build your wake up? Or are your rear lockers full of gear and you need to place ballast elsewhere? Designed to sit on the floor of V-drive boats, the Fly High 500-lb. Floor Sac adds a significant amount of weight to the middle of your boat to help create a more sizable wake for your riding pleasure. Thanks to its incredibly tough construction, the bag tolerates sitting, standing, and walking. Bag is easily filled and drained using Fly Highs portable Tsunami Pump. Made from durable Valmex material. Includes 1 fill valve and 1 drain valve. Measures 40L x 40W x 8.5H. One-year warranty. (Requires Fly High Pro X Tsunami Pump, item# 313928, to fill and drain). | Fly High Floor Fat Sac, 500 lbs. - Gray - Grey | The House