New Shrink Wrap Installation (no tool needed to install) CasterTire Floor Savers convert damaging, hard plastic casters into soft, quiet, floor saving wheels. One Size Fits 1 3/4" - 2 1/4" plastic casters. Standard hard plastic casters cause scratching and damage to VCT and hard surface floors by grinding in dirt and grit. Our universal CasterTire is made of soft non-marking vinyl and is recommended to protect all surfaces, especially VCT, hardwood and ceramic tile. Recommended for use on Hardwood floors, VCT, vinyl, linoleum, finished concrete and ceramic tile floors. Install fast with heat gun or hair dryer.