UP SURF Fiberglass Honeycomb Keel fin Twin Keel Fin TF Black/White surboard fin

["Slice smooth sweeping arcs in the waves, with the stiff flex and balanced template of these Tir Fin set. The Tir fin set of surf thrusters is suitable for most surfboards and assists surfing in different wave conditions.","Package: Duoble tabs fin box compatible.","Material: fiberglass. Solid fiberglass provides surfers with support while surfing, allowing them to glide easily through the waves.Honeycomb hexagonal inner core can maintain the strength of the fin while making the fin lighter. The entire manufacturing process is accomplished through a process called resin transfer molding (RTM).","DURABILITY: Tested and thrashed by UPSURF professional group to make sure what buyers ordered are durable enough for usage."]