High quality: The office chair casters are durable, lightweight, and have a high load capacity (up to 450 kg). The hard floor casters are coated with premium polyurethane - This provides excellent protection against floor damage and marks, saving you money on costly repairs. Quiet and smooth glide: The double casters are ideal for reducing the load. This allows you to improve stability and steer more easily than with a single wheel. The chair's premium rubber casters are quiet and glide easily. Even if you're working or playing games, you don't have to worry about disturbing others, so you can concentrate better on your work. Usage General: Office chair casters can be used for tile, hardwood, laminate, marble, concrete, or vinyl floors. These high-quality 11mm x 22mm casters can be installed on a wide variety of chairs, such as luxury leather chairs, computer chairs, home desks, and other office chairs. This is a great option. However, they are not suitable for use on Ikea chairs.