Fit IKEA Chair ONLY: Please make sure your chair caster stem size is the same as 10*22mm, or these caster replacements wont match with your chair.Heavy Duty: Each caster is able to bear up to 30kg, and whole set of 5 together can bear up to the maximum weight of 150kg, safe and stable compatible with all people.Smooth & Quiet: Smooth and quiet glide are the priorities compatible with office chair wheels. These caster wheels are very flexible when rolling the chair; no much noise with premium rubber, great choice compatible with office.Perfect compatible with All Floors: Made of nylon rubber, these casters are made to protect hardwood, laminate, tile, slate and all other hard floors from damage and scratches.Simple Installation: Just follow the instruction with a few simple steps then good to go, no tools required compatible with installation, easy compatible with everyone.