The AXIS 2018 18mm G10 fins continue unchanged from the previous year. Our 18mm fins are made out of green solid Premium G10 material. When connected to our wakestyle boards, they are secured by 8 x stainless screws and with our own AXIS fin retainers. The retainers spread the load from the screws to the deck area to minimize tip damage in case of an impact. We recommend the 18mm fins to be used with the AXIS Billy, AXIS Tranq and AXIS Bootleg boards.