1-1/4-inch Self-adhesive Rubber Feet for Computer Chassis/projects, Package of 4 - Black 1.25"(31mm) in Diameter and .25"(7mm) thick A self adhesive backing allows for quick and effective mounting to almost any surface Peel off backing to use, easy to install Made from a rubber compound that provides great traction on almost any solid surface top Provides a non-slip, non-scratch surface