Foam & PVC Plastic Letters Our lightweight foam & PVC letters are perfect for indoors and are extremely durable. We choose high-density foam core with a hardened smooth surface on the front and back. They are usually routed and then painted in any set of custom colors. 1/4鈥?and 1/2鈥?PVC is our absolute favorite choice for all indoor and outdoor routed dimensional letters. PVC letters are perfect because they allow smooth routing and hold the paint very well. They are the best choice for interior lobby signs and exterior logo signs. Metal Letters If you are looking for a high-end look of a metal sign that is a bit more elegant and polished, then we have the perfect metal letter options for you. We produce solid aluminum letters for indoor signs and very cost-effective brushed metal or chrome finish letters as well. There are virtually unlimited size and thickness options available with metal letters.Indoor Signage in stock website:http://www.ydsign.com/signage/indoor-signage/