This "Best Friends" roller pen featuring a Doberman Pinscher design by world famous artist Ruth Maystead is a unique and charming collectible pen. Made of plastic, this roller pen measures 5.25" long, 13 mm diameter and weighs 0.4 oz. It is black ink, medium point and has gold tone cap with shirt clip. Perfect for dog lovers and collectors alike the design of this pen showcases the intricate details and character of the majestic Doberman Pinscher breed making it a special and functional addition to any desk or workspace.