Kovax KCR240 Sel-Adhesive Sandpaper

This sandpaper is good quality and a perfect fit for radius sanding blocks. It's a bit expensive though. Any decent quality sandpaper from your local hardware store will work just as fine, as long as you're willing to cut it to the correct shape and use some double sided tape to fasten it.

I really like this sandpaper but I don't think I will buy it again to be honest. If the price was lower, sure, but compared to most other types of sandpaper this is simply too expensive for such a tiny roll.