Premium Material: The Push Button Cover is made from PP material, sturdy and wear resistant, not easy to break. Opening hole: 22 mm. Ensures long-lasting use. Protective Cover: The Emergency Stop Button Cap helps prevent dust accumulation and accidental contact, providing reliable protection. Easy Installation: The dustproof Button Guard installs quickly and easily without professional tools. Fits standard buttons. Waterproof and Dustproof: The Switch Cover Protector is suitable for indoor and outdoor use, including damp environments. Provides safe and reliable protection. Multifunctional: Can be used on computer power buttons, desktop switches, and other similar applications. Specification: Material: PP. Dimensions: 4.3 cm x 3.9 cm x 1.65 cm (1.69 in x 1.54 in x 0.65 in). Package Includes: 1 x Push Button Cover Guard. Note: Slight measurement variations of 1–2 cm (0.39–0.79 in) may occur due to manual measurement. Color may vary slightly depending on screen settings and lighting.