High quality: Office chair wheels are durable, lightweight, and have a high load capacity. The hard floor casters are coated with high-quality polyurethane, providing protection against floor damage and marks, helping to avoid costly floor repairs. Quiet and smooth operation: Double-wheel design helps reduce load distribution, improving stability and making steering easier compared to single-wheel casters. High-quality rubber wheels operate quietly and glide smoothly. Ideal for use in quiet environments, including nighttime work or gaming, without disturbing others, allowing better focus. Wide compatibility: Suitable for use on tile, parquet, laminate, concrete, and vinyl flooring. These 11mm x 22mm casters fit a variety of office chairs, including leather executive chairs, computer chairs, home office chairs, and other standard office seating. Not suitable for all chair types; please verify caster size before purchase. Easy installation: No tools required. Simply remove the old casters and press in the new ones by hand. Installation takes only a few minutes, quickly restoring full function to your chair. 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.