• Set of 5 universal rubber casters for office chairs, standard size 11 mm x 22 mm • Made of high-quality steel with extra-thick polyurethane coating to protect hard floors such as wood, tiles, stone, laminates, and also carpets • Allow silent and smooth gliding at home or office, preventing annoying noises • Double rows of wheels designed to support up to 450 kg of weight • Easy installation: remove the old wheels and slide the new ones into the slots, no tools required • Compatible with most office, desk, and gaming chairs (not compatible with IKEA and Topstar chairs) • Ideal for keeping the floor scratch-free and making chair movement easier