Momentary push button switches may be used in a variety of applications including cars, motorcycles, boats, computers, LEDs, and electronics projects. Use them as a power switch for your computer, a boat horn or starter switches for cars, trucks and automobiles, and other applications in which temporary activation of an electrical current is desired This switch has a protection rating of IP67 waterproof, meaning it can withstand exposure to heavy rain, splashes, etc., without damage Constructed of nickel plated copper; resists rust and corrosion Small size, the 18mm face is about the width of a dime