The Premier Office Chair Caster Wheels PU Large 60mm (2.5&rdquo;) Black & Grey. - Standard Size wheel will fit most chairs. Perfect for Hardwoods or Carpet. Quiet & Smooth! The Best Quality Guaranteed! QUALITY!!! MATERIALS & SERVICE: Made with high quality Polyurethane exterior in our Unique Production Process. Protect Your Hardwoods & Floors. Guaranteed for 5 years. As a small business we are able to deliver superior quality products & customer support than our competitors. You're in safe hands. ENVIRONMENTALLY FRIENDLY MATERIALS: Other casters usually made with cheap material (usually PVC, it's not eco-friendly material, after short time usage, the material will peel and come off. GUARANTEED TO LAST: Made with High Quality Steel. Each Wheel can hold up to 110lbs, (550lbs total with 5 wheels.) STYLISH OVERSIZED WHEEL, GREAT FOR CARPET: Sophisticated Design, 60mm (2.5") Wheel. Great for use on Carpet. Casters have a wider base that makes it Glide with Ease. If you have carpet, stay away from narrow base casters, they will sink into the pad and will be hard to maneuver. NO CHAIR MAT NEEDED: Save Money! No Need for Floor Mats at Home or Office. Designed to prevent scratches and Protect all Hardwood Floors, Laminate, Tile and Slate. These are casters that you will take with you to your new office chair.