This dispenser has a patented pivoting head for precise curves and lines. Contains 50-feet of clear, photo safe, acid free adhesive. Bonds instantly, neatly, and securely. It also comes with a protective cap for storage and travel. Tape measures 5/16-inch (7.9-millimeters) by 50ft (15.24-millimeters). Conforms to ASTM D4236. Imported.