[Mute and prevent scratches] The height of the fixed feet of office chair glides matches the height of the mounting feet, effectively preventing the pressure rod from causing damage to the floor. [Suitable for all kinds of floors] Fixed stationary glides offer excellent traction and maintain stability on smooth surfaces (wood, tiles, laminates), delivering better grip than traditional casters while minimizing friction, vibration, and noise. [Replacement for casters] The replacement glides are compatible with various types of swivel chairs (executive chairs, office chairs, gaming chairs, and more), making it easy to convert your rolling stool or office chair into a stable fixed model. [Efficient installation] Replacement office chair wheels are simple to install and can be removed easily; no screws are necessary. Just pull out the old casters and push the new glides into place. [Good traction for smooth movements] These gliding devices provide stability on smooth floor surfaces (like wood, tiles, and laminates), ensuring greater traction than casters. [Easy to install] Installation is straightforward and requires no extra tools. Compared to casters, they eliminate the “rolling chair effect” when getting up from a table or desk, benefiting individuals who have difficulty with mobility. [Protects your carpet] Unlike some types of casters, these glides will not damage carpets. [Perfect for atypical situations] Ideal for use on moving surfaces, such as boats and RVs, and with floors that are not perfectly flat. [Heavy-Duty & Super Quiet] Fixed glides maintain solid traction on smooth floor surfaces, offering enhanced stability compared to casters. Additionally, we include 5 foot pads to further minimize friction, vibration, and noise. Colour: black Material: nylon Size: diameter 52mm, plunger: 11x22mm, installation height 35mm Package Contents: 5 * Swivel chair fixed glides, 5 * Foam pads Only the items listed above are included; other products are not part of this package. Note: Due to lighting and different displays, the color of the item may slightly differ from the actual product. The measurement tolerance is +/- 1-3cm.