Safety Technology International, Inc. UB-1 Universal Button, Momentary Illuminated LED Push Button, Ready to Assemble Out of Box 300 different combinations for the price of a standard one configuration button Faceplate constructed of cast aluminum to take tough knocks in stride Single gang plate is slightly oversized to cover old plate installation marks Button and message plates constructed of high impact polycarbonate Three year guarantee against breakage of polycarbonate lenses in normal use