Futures F6 HC Thruster Legacy Series (Medium) The F6 Legacy Series is a medium sized thruster in the Neutral template category. The Honeycomb construction gives a balanced feel for all-around performance. Template Category | Neutral (balanced, all-around) Construction | Honeycomb Ride Number | Balanced – 6.4 Size | Medium (145 – 175 lbs) Side Fins Center Fin Area 15.12 15.12 Height 4.56 4.56 Base 4.35 4.35 Foil FLAT 50/50