We Highly suggest adding a Bungee Extension Kit for oversized watersports toys. The universal Tetrapad is designed to hold a 9' x 15' watermat, and a standard size 2 - person tube. So if you have anything larger than that we recomend buying a extension kit. We offer 3 different kits 5" / 10" and Mult-pack which has both sizes. Each pack comes with 2 bungees at the designated size. If you need a custom size fill free to contact us so we can fill your request.