Momentary Type: Resetable [Push & Hold - ON, Release - OFF]; Mounting Hole Size: 19mm, Switch Rating: 3A/250AC, Switch Combanation: 1NO IP65 waterproof and high quality metal material which can be used in wet or dusty environment. Screw clamp type terminals, don't need to solder. Perfect for your small DIY Mods. Great for electromagnetic starter, relay, Horn Button Switch, PC Power Switch or any circuit controls on over 500,000 cycles. The push-button switch is a simple switch mechanism for controlling some aspect of a machine or a process. Buttons are made out of hard material, durable and reliable. Mechanical life for 500,000 cycles. Be widely used widely for circuits control in electromagnetic starter, contactor, relay and other electric circuits. Such as motor starting, power starting device or access control button. Specification: Mounting Hole Size: 19mm Switch Rating: 3A/250AC Switch Combanation: 1NO Momentary Type: Resetable [Push & Hold - ON, Release - OFF] Head Shape: Flat Enclosure Material: Nickel Plated Brass/ Stainless Steel Degree of Protection:IP65, IK08 Package Includes: 1 x Push Button Switch