"The gun template has longer side fins than the center fin. The side fins are quite big with not much rake in the tip and only slight to moderate flex. This combination gives fantastic drive and holding power on bigger waves and high speeds. Having a smaller center fin gives much more maneuverability and smoother rail to rail transition. These fins can be used on all boards from 6'6″ right up to 9'6″." -Wayne
3 FIN THRUSTER SET UP -Back fin, Base 114mm, Height 114mm...Side Fins,Base121mm. Side Fins, Base 121mm- Side fins Bigger.