1. The accessories are durable and easy to install2. DIY repair and replace the fallen or broken button, highly match with the device.3. There are different styles of buttons to fit different switch slots4. Suitable for Dyson hair dryer HD01 HD02 HD03 HD04 HD085. Material: plastic6. Package Contents: 4 x Switch Buttons (Only the above package content is included, other products are not included.)