EXTREMELY COOL TRUE 3D HOLOGRAM. This hologram was created in the laboratory of Polaroid Holographics in Cambridge MA in the 1980s (which closed in the mid 1990s). The image was created from two extremely realistic models (models created by a medical miniaturist, hologram made originally for inclusion in a medical encyclopedia). This is a two-channel hologram, one being the brain alone shown in the skull cavity, the second has musculature and eye etc.. This image is not for the faint of heart, it is medical scientific in nature - awesome gift for anyone in medical or bio-sciences fields. This is an extremely 3D true film hologram and must be viewed under a quality illumination source to be seen in it's full glory, which can be direct sunlight (not in shadow or behind a cloud), halogen light, streetlamp at night, single LED etc. It will work in diffuse such as fluorescent or shadow light but not well. The hologram is actually 3.2" square but only 3" is showing through the black paperboard matte with outside dimensions of 5" X 7". The film color is red, though the hologram is a green/gold monochromatic image. This image is matted and packaged in a clear cello protective wrap. We have quite a number of these on hand so will be re-listing and offering the same image eventually as other products as well. If you have any interest in holograms, this is a must-have for a great price! Thanks for your interest. Holograman