The CM-450WR-12 from Camden Door Controls is a double gang, push/pull, N/O and N/C stainless steel faceplate, maintained red button with 'Press For Emergency Assistance', black text. Camden Door Controls CM-400 Series mushroom push switches are medium-duty push-button controls. buttons are available in red, blue, or green (other colors on request), with a 1 5/8" (40mm) diameter. The buttons are free-spinning, for protection against vandalism. They are supplied with an industrial grade stainless steel faceplate, in one gang or two gang widths. The switches are UL /CSA approved, rated 6A at 30VDC. Select models are UL294.