XeloTech Hard Floor Casters for Office Chair, 5 Pack, 11mm x 22mm, Extremely Quiet Replacement Wheels - No More Chair Mat - No Scratches on Floor with These Premium Casters

["[Attention important] - Please determine the correct pen size to the millimeter before purchasing! This will save you time and nerves. These casters have an 11mm x 22mm stem and fit 90% of office chairs. (But they do not fit on IKEA chairs)","[German company] - For 7 years we have been producing these high-quality casters and have over 100,000 satisfied customers in Germany and Austria who appreciate our quality and service.","[Safety for all hard floors] - Protect your floor with our gentle yet highly durable polyurethane casters for your office chair. Our gentle casters do not leave dark or black stripes on the floor covering. Perfect for tiles, parquet, laminate, wood, marble, granite, stone, concrete, vinyl flooring, wooden floors.","[Silent, Smooth, Durable] - Glide completely noiselessly on your office chair. Even in the evening in the home office, no one will be disturbed by your work anymore. Perfect for gamers who like to play at night.","[For all chairs with 11mm x 22mm stems] - Suitable for every desk chair that supports 11mm x 22mm casters (Note: IKEA uses 10mm casters, also many Topstar office chairs have 10mm holes).","[Design] - These casters will upgrade your office chair because they have a unique and very modern design. The casters are unbraked."]