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 from entering the emergency switch and protects against accidental contact, providing reliable protection. Easy Installation: The dustproof button guard is easy and fast to install without the need for professional tools; it can be quickly mounted on the button. Waterproof and Dustproof: The switch cover protector is waterproof and dustproof, suitable for use in outdoor or wet environments, offering a safe and reliable solution. Multifunctional: The emergency stop button cap can be used for computer PC power buttons, desktop buttons 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 due to manual measurement.