Designed by Chris Christenson. The tracker fin comes in 5 sizes. The 8 to 8.5 will work amazing in your favorite mid length board. Then step it up to the 9 to 10 for your everyday log. This timeless template lends itself to smooth arcing cutbacks and down the line speedenjoy the ride man!Construction: Fiberglass & ResinSize: Height 9.0 in. | Base 6.31 in.Flex: Medium