UNIVERSAL OFFICE CHAIR CASTERS: The office chair casters are made of premium rubber material, the wheels fit most of all standard stem 2 inches 5 wheel office chairs. Fit most of the standard stem size, It's not applicable with IKEA chairs. HEAVY-DUTY CASTER: The heavy-duty design supports up to a capacity of 60 lbs as a set of 5, the support brackets provide long-lasting durability, you will be able to enjoy it for many years. SMOOTH SILENCE: Precision ball bearings in the caster swivel and axel provide smooth, easy rolling. Enjoy smooth rolling with our swivel casters. Dont have to worry about disturbing your family, colleagues, and others. PROTECT YOUR FLOOR: These replacement wheels for office chairs are used to protect hardwood, laminate, tile, slate, and all other hard floors from damage. Note: Not recommended for thick/tall carpets EASY TO INSTALL: Installation step is particularly simple, without using tools, simply pull off old casters from your office chair, then firmly insert the new casters and make sure they are be secured. Size : installation height63mm Wheel diameter50mm Circlip height11*22mm Package included5pcs*Office Chair Wheels