Premium Material: The push button cover is made from PP material, sturdy and wear-resistant, not easy to break, with an opening hole of 22mm, ensuring long-term use. Protective Cover: The emergency stop button cap effectively prevents dust accumulation and accidental contact, providing reliable protection for the switch. Easy Installation: The dustproof button guard is simple and quick to install without the need for special tools; it can be securely mounted directly onto the button. Waterproof and Dustproof: The switch cover protector offers waterproof and dustproof performance, suitable for use in outdoor or damp environments, delivering a safe and dependable solution. Multifunctional Use: The emergency stop button cap is compatible with various applications, such as computer PC power buttons, desktop switches at home or in the office. Specification: Material: PP Size: 4.3 cm x 3.9 cm x 1.65 cm / 1.69 inch x 1.54 inch x 0.65 inch Package Includes: 1 x Push Button Cover Guard Note: Please allow slight measurement deviations of 1–2 cm (0.39–0.79 inch) due to manual measurement.