Latching switch: Push--ON; Push it again--OFF The switch and LED are separated, LED can be on all the time or only on when switch is on,depending on how you wire it Great for electromagnetic starter, relay, Horn Button Switch, PC Power Switch or any circuit controls Mounting Hole Size: 16mm Diameter; Switch Combination: 1NO1NC/2NO2NC IP67, IK10 protection can be used in wet or dusty enviroment Specification: Mounting Hole Size: 16mm Diameter Switch Rating: 3A/250V AC Switch Combination: 1NO1NC/2NO2NC Operation Types: Latching switch: Push--ON; Push it again--OFF Head Shape: Flat LED Voltage: 12V Lamp Type: LED Illuminated Working Temperature: -20 ~ 50℃ Protection Level: IP67, IK10 Shell Material: Nickel Plated Brass + Stainless Steel Button Part Diameter: 1.1cm Hexagon Diameter: 2cm Total Length: 3.3cm 5 Pin Length: 0.6cm Package Includes: 1 Piece Self Locking LED Push Button Switch (2 Pack) Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !