Features For Switch Button: The protective cover is mainly used to be installed on the emergency stop switch control button to prevent accidental touch. Reasonable Structure Design: The 22mm emergency stop button lock protection cover has a reasonable structure design, which is easy to lock and can effectively lock the emergency stop button switch. Easy Installation: The inner diameter of the installation hole of the button lock protective cover is 22mm, which is a standard size, easy to install, and can meet our needs. Applicable Scenarios: The transparent protective lock cover of the switch is suitable for industrial, chemical, electric power, petroleum, coal, flammable and explosive places. Selected PC Material: The transparent protective lock cover is made of selected PC material, which is excellent in workmanship, resistant to bending, durable and not easily damaged. Specification: Item Type: Button Switch Protector Model: BS-01 Material: PC Purpose: Install on the control button to prevent accidental touch Mounting Hole Inner Diameter: Approx. 22mm / 0.9in Package List: 1 x Button Switch Protector Package List 1 x Button Switch Protector