High Quality: The office chair casters are coated with high-quality polyurethane, which provides excellent protection to prevent floor damage and leaving marks, extending the life of the casters and saving you expensive floor maintenance costs. The computer chair caster is durable, lightweight and has a high load capacity (up to 450 kg). Quiet and smooth gliding: Dual casters are an ideal choice to reduce the load. This allows you to improve stability and steer more easily than using a single caster. The high-quality rubber casters on this chair are very quiet and smooth to glide. Even if you are working or playing games at night, you don't have to worry about disturbing others and can concentrate better on your work. Wide range of applications: Chair casters can be used for ceramic tiles, parquet floors, laminate floors, marble, concrete or vinyl floors. These high-quality 11mm x 20mm casters can be installed on various chairs, including luxury leather chairs, computer chairs, home office chairs and other office chairs. This is an excellent choice. However, they are not suitable for use on IKEA chairs. Measure before you buy. Easy installation: Replacing office chair rollers requires no tools and can be done manually. Simply remove the old office chair rollers and slide in the new office chair rollers to install them. It doesn't even take a cup of coffee to revive your flesh. Because the whole process only takes 5 minutes.