Sporting a contactless design to ensure long life, the FP01 Series illuminated pushbutton switches employ a diode photo interrupter rather than traditional contacts. Featuring super-bright LED illumination, users can choose colored actuators to match the red, green or amber LED illumination, or for subdued illumination in low light environments by specifying a white actuator over the LED. Other features include a behind panel depth of 21.4 mm and an operating temperature range from -25°C to +50°C. NKK SWITCHES, Scottsdale, AZ. (480) 991-0942.