✔Universal Use - Never worry about damaging your expensive hardwood floors again. Our high-quality wheels are built with soft, polyurethane material. Our Rollerblade style wheels are guaranteed not to scratch or leave marks on any surface. You can rest easy now that all your floors are completely safe. ✔Peaceful And Smooth Rotation – Find peace and quiet with the help of our hassle-free caster wheels. Built with Precision ball bearings in the caster swivel and axel provide smooth, easy rolling while causing no squeaky sounds or noise of any kind, providing a quiet work environment for your co-workers and family. ✔Super Strong --- Our top-rated Casters are designed with a superior grade steel bearing, metal bearing bracket, and bearing structure. Each caster can support 130 lbs, and a total of 5 casters can support 650 lbs. These wheels are built to last, providing you a lifetime of effortless rolling and durability with the strongest chair wheels in the world. ✔Perfect Compatibility --- With 11 mm Universal fit standard stem diameter, these casters can fit most furniture models perfectly. Completely compatible with office chairs in America, making it the easiest choice for you to select the most suitable casters and replace your old broken ones. ✔100% Satisfaction Guarantee --- You will fall in love with our luxury chair casters once you get your hands on them. Never fear, our Casters are backed by our 12-month warranty, 100% satisfaction guarantee, and 24/7 friendly customers support.