Blank metal signs are gloss white and made from aluminum. Single sided printing. 12"x18" with a hole on the top and bottom. UV protective coating. ***Pressing Instructions*** *Remove protective plastic film from both sides before pressing* Make sure to tape the transfer well or use adhesive spray (I recommend tape). Place transfer on top of the substrate with the image design facing down. Place between blowout paper. Press at 400 degrees for 60 seconds with medium heavy pressure.