This is a 23cm middle fin dedicated to iWindsurf boards and other windsurfing inflatables. Made of robust plastic, it has proper stiffness. The fin has US Box mount system, which is a global standard. The screw doesn’t require any tools, you can fix it with your hand thanks to a mini-handle. The middle fin has a purpose to keep the board on course, so the wind doesn’t push it to the side. You can also use it as a bigger back fin.

The screw is not included. You can buy it as addition with fin.