The product is a 6x4 inch postcard featuring the Iron Mountain tunnel in the Black Hills of South Dakota. The postcard is an original print by RUSHMORE PHOTOS & GIFTS, showcasing a photochromic era landscape of North America. Made of cardboard and paper, this printed lithograph captures a unique aspect of roadside America, making it a great addition to any postcard collection focused on landscapes, cities, and towns. The postcard is unposted and comes with a divided back for easy mailing.