These laminating pouches are of high quality and are made of the best combination of plastics to ensure the best results. Directions: Feed the pouches into the laminator closed end first, set the temperature of the laminator to 248 F (120 C) (4.5 - 5) for perfect lamination. Size info: 1 Mil is a thousandth of an inch, 5 Mil is 0.005. - Outside the United States, laminating film is measured in microns rather than mils. A micron is a thousandth of a millimeter (0.001 millimeters) these laminating pouches are 125 microns thick.