[Mute and prevent scratches] The fixed feet of the office chair glides are designed to be close in height to the mounting feet, helping to prevent the air pressure rod from damaging the floor. [Suitable for all kinds of floors] These stationary casters provide good traction and maintain stability on smooth floor surfaces such as wood, tiles, and laminates. They offer greater traction than standard casters while reducing friction, vibration, and noise. [Excellent caster replacement] These replacement glides are compatible with various swivel chairs, including executive chairs, office chairs, gaming chairs, and tables or chairs. They are ideal for converting a rolling stool or office chair into a more stable, fixed position. [Efficient installation] The replacement chair glides are easy to install and remove without tools or screws. Simply pull out the old casters and press the new ones into place. [Good traction for smooth movements] These glide caps ensure stability on smooth floors and provide reliable performance without rolling. [Easy to install] No tools required—installation is quick and straightforward. [Stability and comfort] Helps eliminate the "rolling chair effect" when standing up from a desk or table, offering added stability for users who need support when sitting down or getting up. [Protect your carpet] The design prevents damage to carpet surfaces, avoiding the tearing or chewing commonly caused by traditional casters. [Ideal for unique environments] Suitable for use in atypical settings such as boats and RVs, as well as on slightly uneven floors. [Heavy-duty & super quiet] These fixed casters provide durable performance and operate quietly. Includes 5 foam pads to further reduce friction, vibration, and noise. Color: Black Material: Nylon Size: Base diameter 52mm, plunger 11x22mm, installation height 35mm Package Contents: 5 x Swivel chair fixed casters, 5 x Foam pads Note: Light and display settings may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3cm.