Futures Pivot Quad Rears (M) The Medium Pivot Quad Rear fins, built in lightweight honeycomb construction, feature an upright template and flat inside foil that caters to quick direction changes and maneuverability. Looking to turn your favorite Thruster set into a Quad? This pair of Quad Rears can be combined with any Futures front fins to suit your riding preference, board design and waves. Template Category - Pivot (tight-turns | quick) Construction - Honeycomb Size - Medium Sold as a pair (left + right fins) to fit Future's shallow depth fin boxes