The F6 Alpha is a medium size Balanced fin with a Ride Number of 5.5. Alpha's C6 composite material is carbon and air infused making it lighter than Honeycomb. The responsive flex characteristics of C6 combine with the neutral F-Series template to create one of the most exciting new products on the market. All Alpha products are designed and manufactured exclusively in Huntington Beach, Ca USA. Area 15.12 15.12 Height 4.56 4.56 Base 4.35 4.35 Foil FLAT SYMM *Side fin set only, no center fin included