FCS II Panda Twinzer Fins,Amazon.com : UPSURF Surfboard Fins Double Tabs Fins K2.1 Honeycomb+Fiberglass 5 fins Thruster+Quad Set (Blue (lLogo)) : Sports & Outdoors,Thruster Fins For Surfboards | Tri Fins | FCS - FCS US,FCS II JS Power Twin Fin,Fins – Ossies Surf Shop