Load CapacityEquipped with two clear double ball precision bearings and a shock absorbing polyurethane tire, while the double clear wheels are rated for a maximum weight of 1000lbs, the chair will not bother others with noise when moving. Floor ProtectionWhether you use our office chair casters on hardwood flooring, carpet, tile or wood, the improved, shock-absorbing polyurethane rubber office chair casters will protect your floor from scratches and marks, saving you money. . General applicationThese high-quality swivel chair castors measuring 11mm x 22mm can be used for a wide range of steels. Examples are luxury leather chairs, computer chairs, home offices, and other office chairs. This is an excellent alternative. Please take measurements before purchasing.(Does not apply to IKEA chairs) . Easy Installation No tools are required for installation, it can be done manually. Just take out the old desk chair casters and slide in the new replacement office chair casters and its all set. You can also install it while on the phone because it only takes 5 minutes and your chair will be like new again. . Quality Service If you do not like our products or they do not meet your needs, please do not rush to comment, contact us as soon as possible and we will solve your problem, customer satisfaction experience is what we always pursue. .