evo.com | Lib Tech Fins > The Lib Tech Alt Tri + Micro Keel Fin Set was put together to provide optimal control, speed, and responsiveness on river waves and in wave pools. Slot 'em into your board and carpe that diem baby! Upcycled Construction Since almost every surfboard in the world is basically an oval shape cut out of rectangular material, Lib Tech is saving the unused corners of their surfboards and making fins out of them. 4 Fins Alt Tri Fins (x3) 4.625" Micro Keel Fin (x1) 1.695" Key Included | Lib Tech Alt Tri + Micro Keel Fin Set 2027