The CM-4000R-8 from Camden Door Controls is a spring return, normally open, momentary, red button, 'push to lock', black text. CM-4000 series mushroom push buttons feature large 1-5/8" (40mm), free-spinning buttons that are easy-to-activate. Available in red, blue, or green (black, yellow on request) and with various logos or words engraved on the button. Faceplates are cast with heavy duty aluminum and available in single gang or narrow widths. Push button options are spring return, push/pull, and push/turn to release operation. May also be ordered with integrated pneumatic time delay. If no color is indicated, RED will be supplied.