Cabinets were installed with glass shelves and brackets like in the picture, but without the cushions. As a result, the glass rattled. Installing these cushions fixed things so the glass fits tighter and is cushioned so it does not rattle.
I bought these cushions with a new set of shelf supports for a curio cabinet that we've had for several years. I bought a color that would not stand out and I wanted cushions that would not slide around and detach.
Both items work great. I would highly recommend both and now our curio safely holds my wife's precious things with no tipping or slipping with the glass shelves