Flying Diamonds Surfboard Fins available at the Surf Station! Flying Diamonds of California is a surfboard fin brand that was created to give the world's most elite surfers the creative freedom to bring their designs to life. Utilizing years of knowledge and experience to construct the highest quality fin to take anyone's surfing to the next level. Choose from a wide selection of longboard fins with different styles, with a few sets of twin fins, quads and side bites. Get them while they are hot!