FCS II Performer Neo Glass Quad Surfboard Fins - Medium/BlueThe FCS II Performer Neo Glass Quad Fin Set is the perfect all round quad fin set up for your favorite quad short board. The balance between speed generation, flow, and response make the performer quad suitable for most waves. The FCS II Performer Neo Glass Quad Fin Set is the perfect all round quad fin set up for your favorite quad short board. The balance between speed generation, flow, and response make the performer quad suitable for most waves.