Kumano System : new Kumano Ai is now available for inflatable SUP and foam surfboards using the AIR7 US fin box
How to use fins with Kumano Ai :
insert into your fin box. slide the fin forward lock down & go !
Caution & notes Kumano Ai Fins :
when removing fin, protect you hand, the trailing edge of the fin maybe sharp.
Kumano Ai fins usually come with only one Ai installed.
If the fin with only one Kumano Ai installed is not tight enough, you may need to add one or two Ai to make install better and keep the others as spare.