General description Our set of 5 office chair castors is designed for smooth and quiet operation, making them ideal for gaming chairs and swivel chairs. With a standard size of 11mm (7/16") x 22mm (7/8"), these castors are compatible with most office chairs, although they will not fit IKEA chairs. Technical specifications Size: 11mm (7/16") x 22mm (7/8") Material: High-quality PU Compatibility and accessories Compatible with most office chairs Not compatible with IKEA chairs Installation Easy installation with no tools required Simply snap them into place for hassle-free replacement Usage Designed for smooth 360° gliding Protects floors from scratches and stains Suitable for various floor types including hardwood, tile, carpet, and laminate