Specifications:

• The Chair Casters That Won't Fail:which has passed over 100,000 times of rotation/push/pull/impact test, with no loss of usability function after the experiment,that can support maximum weight up to 2200 lbs
• Smooth, Quiet Hassle-Free Rolling:Our office chair wheels are made of polyurethane material that widens to 2 inches, making movement easy and noiseless. Perfect for home or office, no need to worry about disturbing others
• Universal Size Computer Chair Wheels:Our desk chair wheels measure (7/16 inch x 7/8 inch or 11mm x 22mm), which means they are compatible with 99% of chairs on the market. (Does not apply to I-K-E-A)
• Won't Scratch Floors:Safe for All Floors. Our unique wheels for office chair are safe for any kind of hardwood, parquet, laminate, linoleum, tile and carpet flooring

5Pcs Office Chair Caster Wheels, Heavy Duty Chair Wheels Support 2200lbs, Mute Rubber Chair Casters for Hardwood Floors and Carpet, 2 Inch Universal Fit(Black)