Mounting hole size: 0.5"/12mm, below 250V, without LED Product features: Quality metal shell and silver alloy contact make the momentary push button have strong conductivity, and the push button switch has IP65 waterproof grade, so it is very suitable for use in complex environments Simple operation: The push button switches operation type of this product is momentary, press=open, release=close The package include: 2PCS black+2PCS silver push buttons with pre-wiring cable Widely used: This momentary switch applies to cars, ships, computers, doorbells, household appliances, industrial equipment, medical equipment push button switch