Red Paddle Co have collaborated with FCS, the world's leading fin manufacturers. This FCS 7 fin has a nut and bolt connection to ensure a 100% secure hold and is provided with the Whip (except 2017). Compatible with all US fin boxes. 

Here is our video, which you find on our Red Paddle Co Clubhouse, on how to fit this a fin with using a 'Quick Fit US Fin Bolt': 

https://redpaddleco.com/clubhouse/maintenance-tips/how-to-fit-your-red-paddle-co-fin/

 Fin height = 7" from the bottom of the board. Base length = 5.75"