This revolutionary adhesive bonding system secures tightly to most surfaces including drywall, painted block, brick, glass, tile, paneling and most other wall surfaces. And as one of the "original" removable adhesives, it removes cleanly with no residue, oily spots or marring of walls...guaranteed! These wall savers get an "A." Teacher tested and preferred, this remarkable removable adhesive holds securely and removes cleanly up to two years.Details: Pearl white 1/2" x 1/2" mount size 24 packs (480 mounts per pack, 11,520 total mounts) Remarkably removable adhesive Works on most wall surfaces Acid free Teacher tested and approved