Never installed or touched the water. Endorfins KS1 5-Fin Set FCS II - Medium. A better build - innovative carbon inlays in Endorfins add strength and flex that enable them to be built with a core comprised of 90% pure air. As a result, Endorfins not only provide optimum performance but also literally float on water. This item is in the category "Sporting Goods\Water Sports\Surfing\Surfboard Fins".The seller is "sea_rat" and is located in this country: US. This item can be shipped to United States.