"The Elevate Outdoor high-strength steel T-Rack style kayak carrier mounts to existing vehicle roof rack cross bars no larger than 1.25"" wide by 13/4"" thick. The supports are rubber padded to protect kayaks from scratching during hauling and two 114 inch straps keep kayaks firmly secured in place. Includes all necessary hardware for mounting. Measures 14.75"" L by 5.75"" W by 15.75"" H."