This hologram features the word "SECURE" repeatedly written vertically, with approximately 9 doors with large old-fashioned keyholes on them. When the angle it is viewed at changes, the keyhole appears to be hollow or solid. Multi-Spectrum: Sometimes called full-spectrum, this hologram reflects all the colors of the rainbow (Red, Orange, Yellow, Green, Blue, Indigo, and Violet) as the angle it is viewed from changes. The Thinest: This hologram is only 2 mil thick (0.002", or 0.0508mm). Applying this hologram to your ID card is not going to significantly change it's thickness, making it perfect for any ID card. Tamper-Evident: This hologram features a tamper-evident security adhesive which will destroy the hologram if it is removed or tampered with.