These glides replace the casters on the base of your OFM Office Chair, which turns the chair into a stationary unit. One set of glides is enough to replace all casters on the OFM chair.
Sometimes floor glides are confused with Hard-Floor Casters. Floor glides are essentially plastic feet and make the chair non-rolling. Hard-floor casters are more substantial wheels for hard floors like tile and cement. We also carry Hard-floor casters for OFM office chairs.