Mini push-button 12mm round push-button switch great for AIR RIDE, can be mounted in a 10/32" diameter hole, or screwed in installation requires 9/32" (7. 1mm) drill and 5/16" unf tap. Can also be installed with nut on back. Select BLACK or CHROME finish, and wire options. For air ride, you will need one button for UP and another button for DOWN. Front+rear air would need 4 buttons.