Truck-Lite 07080 Bus Products 4-3/4'' X 6-1/2'' Sealed Yellow Watertight lamp mates w/Packard connector 12 volt lamps functions as a front park/turn lamp (yellow) & is direct replacement for GMC buses Recess mounts using two screws at 3.0" centers & two screws at 4.2" centers Contact technical support for special mounting instructions 12v lamps mate with P.E. Connector 62884715