The Ahi Twin is a performance oriented upright twin fin, designed by Duke Aipa, for his Dark Twinn model as well as other high performance twins and twinnies.  The wide base provides loads of drive and the upright template and refined tip provide increased maneuverability over more classic twin fin outlines.  These fins are ideal for increased speed and fluid rail to rail transitions.  This fin is FCS 1 if you have FCS 2 you'll need to purchase this FCS infill tab kit. 

Twin

Base: 5.15 inch

Height: 5.60 inch

Area: 19.13 square inch

Foil: Flat SeriesIII

Add the optional stabilizer for increased control.