The Fly High Pro X Series Mastercraft X-Star Bow Walk Through Sac is built to fit in the open area between the bow and the interior of the Mastercraft XStar and X-15 wakeboard boats. This sac adds a much needed 450lbs. to the center of the boat. If you don't have a Mastercraft, the Fly High Pro X Series XStar Walk Through Sac might be the perfect size upgrade for the perfect wakeboard and wakesurf wake. No fittings are included with this bag. There are a total of three ports.