[Silent and Prevents Scratches] The height of the fixed feet of the office chair glides is equal to the height of the mounting feet. It is suitable for preventing the air pressure rod from damaging the floor. [Suitable for all types of floors] Fixed stationary feet have good traction, maintain stability on floor surfaces (wood, tile, laminate), greater traction than wheels, and reduce friction, vibration and noise. [Wheel Replacement] Replacement glides are suitable for various swivel chairs (executive chairs, office chairs, gaming chairs, tables and chairs) very suitable for rolling the stool or office chair into a more stable fixed type. [Efficient Installation] Replacement wheels for office chairs are easy to install and remove, no screws are needed, just grab the old wheels and pull out. Then push the replacement wheels for chairs into the holes.Good traction for movements: These glides maintain stability on floor surfaces (such as wood, tile and laminate) while providing greater traction than wheels. Easy to install: is very easy to install without any tools. than wheels: By avoiding the \"wheelchair effect\" when getting up from a table or desk, provides for people who have difficulty getting in and out of the chair.Protect your carpet: will not chew on the carpet like some well-known wheels.-perfect for atypical situations: perfect for moving surfaces, such as boats and , and floors that are not too flat.High performance and super quietFixed wheels have good traction, maintain stability on a floor surface and greater traction than wheels. In addition, we also provide 5 foot pads to help you reduce friction, vibration and noise.Color: blackMaterial: nylonSize: Base diameter 52mm, piston: 11x22mm, installation height 35mmPackage contents:5 * Swivel chair fixed wheels5 * Foam padsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real one. The allowed measurement error is +/- 1-3 cm.