FCS II Sharp Eye PC Tri-Fin Set Color:Black/Red FCS II single fins are

FCS II single fins are designed to be used in existing FCS longboard boxes so there is no new box required

But most of all

and affordability

Recommended for boards with deep concaves and moderate-to-extreme rocker

FCS II Sharp Eye PC Tri-Fin Set Color:Black/Red FCS II single fins areMarcio Zouvi's 'Sharp Eye' shaper fin. The FCS II Sharp Eye PC Tri Fin Set is a versatile all round Performance Core fin with a larger base, ideal for controlled power turns in critical sections. Fin Size Detail Size Height Base Area Foil Foil Weight Range Medium 4. 55" [115. 4mm] 4. 48" [113. 6mm] 15. 13" [9761mm] 34. 8 Flat Bev 145 175 lbs. Large 4. 66" [118. 3mm] 4. 59" [116. 5mm] 15. 91" [10263mm] 34. 8 Flat Bev 165 200 lbs.