FCS M7 Tri Fin Set Mens 4/3 Wetsuits The F4 is one of

The F4 is one of the most balanced fin templates with a thicker tip that provides additional hold on rail

Flat pad - no arch bar

these rears cater to fluid rail to rail surfing and speed

however these fins are super good in critical overhead waves

Looking to turn your favorite Thruster set into a Quad

FCS M7 Tri Fin Set Mens 4/3 Wetsuits The F4 is one ofFIN SIZE Large Base: 4. 52" Depth: 4. 67" Area: 15712" Sweep: 31 Foil: Inside OVERVIEW M Series GlassFlex Fast and smooth, with better hold and more squirt through turns. The M series has a flexible tip for forgiveness and control at high speed. The new Inside Foil Technology offers superior drive and hold. GlassFlex offers the flax pattern modeled off a hand foiled fiberglass fin and the ability to mold highly technical computer generated foils