The quad set features the M-5 in the side and the M-2 side fins in the rear.
M-5 Front:
Base: 4.37in.
Depth: 4.55in.
Area: 14.76sq.in.
Sweep: 33.0°
Foil: IFT
M-2 Rear:
Base: 4.28in.
Depth: 4.41in.
Area: 14.22sq.in.
Sweep: 31.0°
Foil: IFT
All FCS fins can be ordered as singles. If you do not find the one you are looking for - email us and we'll get you what you need.