Specifications: 19mm Latching push button switch without Led(5PCS). How to use: press to turn on; press again to turn off. Contact configuration: 1NO. Mounting hole size: 0.74" 19mm, please check the size carefully before purchasing. This switch can be used for: cars, ships, trucks, homes, coffee machines, industrial equipment, medical equipment, etc. Waterproof: As the product has IP65 Waterproof, it is very suitable for use in marine applications such as ships. STARELO 5pcs 19mm Latching Push Button Switch Silver Shell with pre-Wiring, IP65 Waterproof Push Button Switch,Stainless Steel 1 Normally Open Without LED.