I bought this for my Thon Studio Rack 20U. It was said by an employee that it should be compatable. It's not; it doesn't fit as it should. With that I mean it should start at the bottom and that's where the problem is. It doesn't start there, but at least 1cm above. Besides that it's not so nice to see, it also doesn't have the support from the bottom plate, which is necessary, if the rack is full.