Mirror Daggerboard Case Cover
Fits into and over the daggerboard case slot on a Mirror dinghy
If you use your Mirror with an outboard or you row it, this is just the part you need.
Since you shouldn't have the dagger board in while using an outboard, it means the boat can fill with water coming up through the case or if rowing it can splash up and wet your bum.
You can drop this into the daggerboard case which helps to reduce the water coming into the boat by filling the space.