68 - 82 Corvette application.  This kit incudes four location specific designed bulb holders and stainless trim rings for either the our basic aluminum brackets. These are new manufacture with trim ring screws. The bulb cups are marked either A, B, C, or D as to location from  passenger side to driver side. All of these are NEW manufacture and will also work with a stock headlight setup. The last attached photo is an example of how the bulb holder and trim ring contains the bulb in the aluminum bulb bracket.