Features 1、Made of flame-retardant ABS material, durable in use. 2、The top cover is equipped with sealing rubber strip, which is dust-proof, waterproof, anti-aging and partially resistant to corrosion. 3、Various types of button switches can be installed inside it. 4、It can be mounted directly on a wall or equipment for field control and signal indication. 5、Exquisite appearance design, easy to install and maintenance. Specification Features: Made of flame-retardant ABS material, durable in use. The top cover is equipped with sealing rubber strip, which is dust-proof, waterproof, anti-aging and partially resistant to corrosion. Various types of button switches can be installed inside it. It can be mounted directly on a wall or equipment for field control and signal indication. Exquisite appearance design, easy to install and maintenance. Specification: Condition: 100% brand new Material: ABS Weight: 202g/7.1oz Hole Size: 22mm/0.9inch Package List: 1* Switch Box Package List