Momentary push button: panel mounting hole size 16mm, push button diameter 13.5mm, press and hold: turn on, release finger: turn off. Service life up to 100,000 cycles, enough for long time use. Premium material: our switch push button made of chrome plated brass with PA66 nylon base, resistant to rust and corrosion, good fire resistance and insulation, stable and durable, easy to clean. maintain. Waterproof and dustproof: the push button switch is equipped with hex nut and O-shaped sealing ring provide IP65 and IK08 protection, resistance to heat, freely usable in humid or dusty environment. Easy to clean. Installation: Easy to install, thickened and widened silver plated pins. solder, good conductivity and high sensitivity contact. The blue LED light can be turned on permanently or instantly depending on the connection method. Wide application: Commonly used in mobile devices, cars, trucks, ships, ignition systems, doorbells and control panels. Ideal for controlling circuits in