This recent Italian design by Italcinte is the best way to protect your accordion from scratching from scratching against buckles when inside a case or lifting on or off..
There’s nothing worse than scratching your box.These elastic tubes can be slipped over the buckle of your straps and will help to stop the scratching.
A great little piece of innovation for an easy solution.Every accordion should have them.Sold as a set of 4 in REDEach tube is elastic and should be able to stretch over any accordion strap buckle.