Improve your wake for wakeboarding and wakesurfing with this complete ballast package. Included is everything you need to build a bigger, better wake. The 540 Big Bag can fit in rear lockers, on the floor, or under the seat. This versatile bag can be placed throughout the boat to create the optimal wake. The dimensions of the 540 big bag are: 50″L x 22″W x 22″H. The included pump is rated at 1,100 GPH.