This item is a Quantum Battery 1 Module MB5 for Canon 580EX and other flashes in excellent condition.  It is old camera store stock  with Velcro packet and box.  It is made for the Quantum Battery 1 and 1+ and fits the following flash units:  Canon 580EX, Phoenix APZ 99C, Vivitar 730AFC and Promaster models FTD7000M, FTD5950 and FTD5700.  Please check your flash application to be sure of proper fits as I am not familiar with all models.