Aqua Marina US Fin box adapter

The Aqua Marina US fin box adapter offers the possibility to convert a SUP with a US box fin into a slide fin. Many SUP boards are made with a US box fin. However, the slide in fins are a lot easier and faster to attach. The US box fin adapter is easy to attach to any SUP with US box fin. Slide the adapter into the fin and secure the adapter, the SUP is now ready for a Slide fin.