WISD Office Chair Wheels 5-Pack, Hard Floor Casters for Office Chair, 11mm x 22mm Stem, Quiet & Scratch-Free Heavy Duty Rubber Casters for Desk Chair, Universal Fit (Not for IKEA)

"[Fits most office chairs]: Stem: 7/16\"(11mm)*7/8\"(22mm) (Diameter * Length) fits most office chairs sold in Germany (Not compatible with 1KEA chairs). Supports weight up to 386 lbs. The difference between 10mm and 11mm is very small, so you need to carefully measure the dimensions of your office chair to avoid problems. [Easy installation]: They can be easily installed without tools or hardware. Simply remove your old casters from your office chair, install the new replacement chair casters, and make sure they are securely attached to the chair. [Safe for all floors]: No chair mat needed! Soft polyurethane material on our office chair casters will not scratch, dent, or leave marks on your floors, guaranteed. Best choice for hardwood, wood, laminate, vinyl, tile, and carpet floors at all times. [Smooth & quiet rolling]: These stylish rubber casters with premium double ball bearings make no squeaky noise and ensure that the chair rolls smoothly and quietly. With 360 ° free-rolling heads and stainless steel balls, you will feel the movement of the casters like silk and you can easily change the direction of the chair. [Trusted brand]: 100% SATISFACTION. Our company WISD is sincerely ready to provide the most satisfactory service to all customers. If you have any questions or want more information, feel free to contact us. Our professional service team will provide you with feedback within 12 hours."