Agfa "Holotest" Vintage Photographic plates. Your bid is for ONE box containing 12 glass plates. The boxes are factory sealed, and have never been opened. These are date expired vintage items offered as a collectors item, or for display/curiosity only. I have no idea how they have been stored, or the viability for actual use. The 10E75 is an IR sensitive material which is optimised for 600-750nm (red to near IR). They may be usable, but maybe not. There is just no way of knowing. I do not have a dark room and have not tried. Caveat emptor.