These connect to FatSacs W736, custom machined fittings Make a secure, water-tight, yet quickly removable connection with the Fatsac 3/4" Straight Quick Release Connector. The straight quick release connector has a 3/4" hose barb fitting on one side and a lockable female end on the other that will connect directly to the Fatsac 3/4" Quick Release Connect. Perfect for integrating Fatsac ballast bags to factory ballast systems in Malibu, Supra, and Moomba wakeboard boats.