Prevent slipping and improve air flow around a computer case with non slip rubber feetr r a self adhesive backing allows for quick and effective mounting to almost any surfacer made from a rubber compound that provides great traction on almost any solid surface topr backed by a startechcom 2 year warrantyr r this pack of 4 rubber feet 1 14in diam feature is great to have on hand for new system builds and upgrades providing the necessary traction to cases and devices that require stationary