The Lockrack Double SUP 50cm Set is designed to hold up to two Stand up Paddle Boards (it is not recommended to use the Lockrack Double Sets with Inflatable Boards). It comes with a Base of 50cm and long arms with an open angle. This Set is perfect to transport two Racing SUP which are a bit narrower than the Standard SUP. You can easily put your two Racing Boards on top of each other, lock them in and go!