Smartsign K-7673-AL-12x12"UFO Cow Abductions Here" with Graphic Aluminum Sign, 12" Square Heavy, 80 mil thick, rust-proof recycled aluminum Uses durable, 3M inks designed for outdoor traffic and property signs. Outlasts other sign printing. Laminate protects against abrasions, graffiti, chemicals, and weather Resists chemicals, UV rays, water, and abrasions Mounting holes allow for hassle-free installation 12"x12" diamond sign has two 3/8" holes at the top and bottom, 12" center to center, with a 1.5" corner radius