FCS SF4 (PC) Tri-Quad Fin Set -
The SF4 (PC) Tri-Quad Fin Set from FCS.
Stretch designed this tri-quad set so you could switch between a thruster set that's ideal for power snaps in critical sections, and a quad set offering quick acceleration and response in punchy, hollow waves. Made for boards with deep concaves and moderate-to-extreme rocker.
The SF4 Tri Quad Set designed by William Riedel, also know as "Stretch," is a set of fins designed to get you thrusting through critical sections while the quad set will get you through hollow waves with ease.