Product Features. SMOOTH & SILENT ROLLING: Experience smooth and silent rolling with the precision ball bearings in the caster swivel and axle. Enjoy effortless gliding without worrying about disturbing your family, colleagues, or others around you. PROTECT YOUR FLOOR: Our replacement wheels for office chairs are specially designed to protect hardwood, laminate, tile, slate, and all other hard floors from potential damage. Please note that they are not recommended for thick/tall carpets. [Product Information] Product Name Chair universal wheel Material: Polyurethane (PU) Product Size: 2 inches Product color: black Packing list Chair universal wheel * 1 Please note 1. Due to the long transportation time, the goods may be damaged during transportation, if the goods are damaged, please leave us a message through the official website immediately before sending comments, I will solve the problem for you. 2. Due to manual measurement, the size may have an error of 1-3cm. 3. 3. The color displayed by different monitors may vary.