High quality: wheels for office chairs are durable, and have a high load capacity (up to 450 kg). Hard floor castors are coated with high-quality polyurethane - this provides excellent protection against floor damage and marks and saves you money on expensive floor repairs Quiet and gliding: double wheels are perfect for reducing the load. This allows you to improve stability and make steering easier than with a single wheel. The high-quality rubber wheels office chair of the chair are quiet and glide smoothly. Even if you work at night or play games, you do not have to worry about disturbing others, so you can focus on your work. General application: office chair castors can be used for tiles, parquet, laminate, marble, concrete or vinyl floors. These 11mm x 22mm high quality castors can be fitted to a wide range of chairs, e.g. luxurious leather chairs, computer chairs, home offices and other office chairs. This is a . However, they are not suitable for use on chairs. Please measure before purchasing. Easy installation: no tools are required for installation, it can be done manually. Just take out the old office chair castors and slide the new wheels in and it's already assembled. It doesn't even take the time of a cup of coffee until your chair comes back to life. Because the whole process takes only 5 minutes. Colour:Gray+black Material:plastic Package Contents: 5 x chair wheels Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.