TroySys Clear Rubber Desk Bumpers w/Adhesive 11.1mm x 5.1mm Hemispherical | 1 Pad (242 ea.) Clear Rubber Desk Bumpers are the perfect rubber spacer between glass and tables. This includes tables, pedestals, and other furniture tops. These rubber desk bumpers control the movement of the glass, and absorb the shock, on many types of surfaces including wood, metal, and plastic. These polyurethane bumpers are the ideal cushions for leveling your glass table top, while also affixing it, so your table tops don't skid