FCS Surf Fins – Medium Thruster (Black) Surfing Convert any FCS II surfboard

Convert any FCS II surfboard into a standard FCS1 (Double Tab) setup

Not too shallow

River surfers

If your board uses a US-Box center fin with screw and plate

FCS Surf Fins – Medium Thruster (Black) Surfing Convert any FCS II surfboardEngineered for surfers who care about performance and the planet, Eisbach Riders fins deliver the smooth drive, precision, and flow you need in every session from ocean waves to river breaks and wave pools. Each fin is crafted with German engineering excellence and eco friendly materials, giving you reliable performance without compromise. Whether youre chasing clean turns or fast, playful rides, these fins give your board the control and balance it