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 155-lb. Brick 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 a quick-connect valve system that makes filling and draining an easy task. Measures 16"L x 16"W x 16"H. One-year warranty. (Requires Fly High Pro X Tsunami Pump, item# 313928, to fill and drain). Incredibly tough Valmex material Easily drained & filled with Tsunami pump | Fly High Brick Fat Sac, 155 lbs - Black