Please refrain from price negotiations. CHRISTENSON designed twin keel fins, SHAPER SERIES. Christenson Twin Keel, Only used for a short time test, so it is considered as almost unused, but please refrain from purchasing if you are nervous. - Brand: FCS2 - Model: CHRISTENSON KEEL - Color: Blood Red - Type: Twin Keel Fins - Series: SHAPER SERIES - Design: Chris Christenson Thank you for viewing. The design has sufficient curves on the leading and trailing edges, and is excellent for smooth transitions from rail to rail. The thick, flat foil provides grip even on large turns and open-face waves. Board Types Designed to fit the FCS II fin system Recommended for all board types such as fish, funboards, and twin fin boards. Twin Fin Christenson Keel Fin Set Type... Fins Fin System/Fin Box... FCS2 Number of Fins... Twin Fins