The Portable Printer Continuous Heat Shrink Labels in White are made of Military-Grade Polyolefin. They measure 0.13" (3.1 mm) Diameter, 8' (2.4 m) Length, and 0.25" (6.4 mm) Width and have a wire range of 22 - 18 AWG. The fast-loading MP™ Label Cassette Includes both Label Material and Ribbon for Easy Label Changing.