Floor Savers convert damaging, hard plastic casters into soft, quiet, floor-saving wheels. Caster Tire Floor Savers prevent floor damage and reduce maintenance costs. Made of soft nonmarking vinyl, they are recommended to protect all surfaces especially VCT, hardwood and ceramic tile. Floor Savers also assure casters roll smoothly and quietly and prevent sliding and skidding. Floor Savers fit easily over existing, hard-plastic caster wheels that measure from 1-3/4" to 2-1/4" in diameter..