Flying Diamonds Taylor Jensen Single Tab Quad Rear Fin SetThe Flying Diamonds Taylor Jensen Single Tab Quad Rear Fin Set are an excellent match for any surfer who wants to add drive and speed to their surfing. Whether it's on a longboard, shortboard, or mid length, this quad rear set is designed to enhance the speed and flow of your equipment while still maintaining peak maneuverability in any condition. Get the performance you want and the speed you need. Fin Size Detail Fins Height Base Area Rear 4. 3" 4.