Self-Adhesive Rubber Feet Square Black Small Bumpers (100 Pieces total!) 0.4" Black Square Bumper (almost a half inch) and .100 thick (like a nickle). These bumpers are easy to install with self adhesive. Protect surfaces from being damaged while also deadening sound. Bumpers protect surfaces from being scratched and help keep objects in place. Protection for counter tops, end tables, cabinets, crafts, etc. against damage from marring.