This is near-pristine euro-pin base with the pro-flex joint, a semi-tendon semi-mechanical base that bends easily at 90 degree angle for easy attachment on the beach or in the water, optimal for foilers who want to attach sail in water. Bought new, used maybe 2-3 times, otherwise perfect. I like rubber UJ better, found a euro-pin one. 2-bolt attachment allows base plate to remain on board. $80 for local pick-up (Chicago), $90 if I ship to you.

SOLD