Rhino-Rack Nautic Kayak StackWith the introduction of the Rhino Rack Nautic Stack it is time to convince your friends to take up kayaking. The vertical design means up to 4 kayaks fit on a single vehicle's roof. Take one vehicle loaded with all your friends' kayaks to the top of the river, white water course or stream and park another vehicle at the bottom so you can easily shuttle back to the top. The Nautic Stack has two fixing styles Includesded in the kit a universal clamp