Momentary Switch: Momentary switches are switches which only remain in their on state as long as they're being actuated (pressed, held, etc. ). These momentary buttons are perfect for Horn Button Switch, PC Power Switch, Kill Switch or any circuit controls. Also great for electronic DIY projects. Note: These switches come with a rubber O-ring which makes them splash resistant but they can NOT be submerged in the water. Customer Support: If you have any questions, please feel free to contact us. We will provide the best customer service and technical support. Specifications: Head diameter: 3/4 inches ( 18mm ) Button diameter: 0. 36 inches ( 9mm ) Mounting hole size: 5/8 inches ( 16mm ) Depth inc contacts: 1. 3 inches ( 34mm ) Switch combition: 1NO1NC Operation types: Momentary Switch rating: 5A/250VAC, 5A/30VDC LED rating: 15mA, AC/DC 12V LED color: Blue Head shape: High flush Enclosure material: Stainless steel Protection level: IP67, IK10 Package Include: 1 pushbutton switch 1 connector