Koalition have used a traditional fin panel construction to manufacture these side fins
They will improve hold and drive and for sure this is the best choice for a traditional single fin setup.
More speed, more control and better stability
Base - Base: 3.85” - 97.8mm
Depth - Profondeur: 3.52” - 89.4mm
Area - Surface: 696.8mm²
Sweep - Angle: 33.2°