An easy way to convert an office chair or rolling table into a stationary unit that is easy to slide. This Bell Glide features a 7/16in.dia. friction ring stem, which is a size commonly found on mobile chairs and tables. To install, simply remove your existing caster and firmly press this glide into place. Glide measures 1-5/16in.W. x 2-3/16in.H., with a sturdy 2-1/8in. Dia. felt base.