Description from Futures.:

The F4 Legacy Series Thruster is a small sized fin with a neutral template and balanced feel for all-around performance

• Template Category | Neutral (all-around, balanced)
• Construction | Honeycomb
• Size | Medium (105 – 155 lbs)
• Ride Number | Balanced - 5.3

              Side Fins    Center Fin   

Area      14.22          14.22           
Height   4.37            4.37             
Base      4.22            4.22             
Foil        FLAT           SYMM