This quad fin set is what comes with all surf style Phase 5 wakesurf boards larger than 53. The 4.3 surf fins are designed for maximum grip and feel while surfing. The fins are an e-glass honeycomb construction for optimal performance. This quad fin set includes a total of four fins: two 4.3 surf fins and two smaller trailer fins. The fins are compatible with any wakesurf board that has FCS fin boxes. Includes a fin bag and FCS fin key.