Universal Button, Switch Action Momentary, Material Cast Aluminum/Polycarbonate, Depth 2 in, Height 2 in, Width 1/2 in, Button Color Blue/Red/Green, Color Silver/Green/Red/Blue/White/Yellow, Button Dia. 2 in, Operating Temp. -40 Degrees to 185 Degrees F, Standards , UL/cUL, For Use With Exit Doors, Emergency Doors, Etc., Includes (5) Button Inserts, (7) Plate Messages and (3) Lens Covers, Faceplate