The FCS II MF fin is Jeremy Flores signature set and is perfect for driving off the bottom and performing fast turns. It's ideal for a wide range of conditions, particularly good in critical overhead waves. This fin is designed to be used exclusively with the FCS II Fin System, and will not fit in the traditional FCS Dual Plug System.Performance Glass material characteristics and flex pattern are identical to traditional fiberglass fins offering a stiff base with subtle responsive tip flex, amazing aesthetics and proven durability. Medium sized fin with 4.65" base and 4.58" depth.