☆MINK SYSTEMS Eliminates turbulence in surfboards Provides smooth and easy-to-control vortices ☆Please see the images for details. It has not been used, but the red M in the last image is missing. Only those who are okay with this, please. ☆Please refrain from purchasing if you are concerned about minor details. I am also selling various other items, so please take a look. I believe it was around 8000 yen.