Med/Lab Thermal Printer Rolls, 4 9/32"" x 78 ft, White, 12/Pack, Sold as 12 Roll Single-ply thermal cash register/point of sale receipt rolls. Guaranteed to work efficiently with your machine printhead. Provides crisp, clear, black images. Passes the IBM? Testing Process?an industry standard. This product was made from wood that came from a certified managed forest.