Want to replace your inconvenient, old-fashioned single-shot No.5 flashbulbs with the technology of today, which is the modern 4-shot flashcube? The Honeywell Cube Adapter is a simple plug-and-play accessory that can do just that, bringing your old flash units into the future (the future in this case is 1971) (it is 1970 now). Flashcubes sold separately.