Check the listing for details. FCS K2.1 Blue White Surfboard Fin Set 3 High Performance Stability. Condition: Used, Made in NA. Listed at 50.00 USD. The FCS K2.1 Blue White Surfboard Fin Set is designed for high performance stability in surfing. This set includes three fins from the well-known brand FCS, known for their quality and durability. The K2.1 model offers excellent stability and control, making it a popular choice among surfers looking for improved performance in the water. Whether you're a beginner or an experienced surfer, this fin set can help enhance your surfing experience and improve your skills.