High quality: Office chair wheels are durable, lightweight, and have a high load capacity (up to 450 kg). The hard floor casters are coated with high-quality polyurethane, which helps protect floors from damage and marks, reducing the need for expensive floor repairs. Quiet and smooth: Double-wheel design helps reduce load pressure, providing better stability and easier steering compared to single-wheel casters. The high-quality rubber wheels operate quietly and glide smoothly on hard surfaces. Ideal for use in quiet environments, such as home offices or shared workspaces, without disturbing others during late-night work or gaming sessions. General application: Suitable for use on tile, parquet, laminate, concrete, and vinyl flooring. These 11mm x 22mm casters fit a wide range of office chairs, including leather executive chairs, computer chairs, and home office seating. Please measure your existing casters before purchasing to ensure compatibility. Easy installation: No tools required. Simply remove the old wheels and press the new ones into place. Installation takes only a few minutes and can be completed by hand. Color: Gray + Black Material: Plastic Package Contents: 5 x Chair wheels Note: Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement may vary by +/- 1-3 cm.