photo frame stopper

I've printed these stoppers for a diy sound adsorbing panel made from an IKEA RIBBA photo frame.

Since the sponge material deflects the thin backplate around the edge, I could previosly see the brown interior of the frame walls that didn't look nice. compressing the foam in those area fixed the issue whitout loosing functionality.

Of course you are supposed to remove the front transparent sheet, as well the other 2 white layers below, they arent needed and add weight