PEC*PADs are strong, non-abrasive, lint-free and pure (99.999%). They are so soft and versatile that they can be safely used to clean all types of sensitive surfaces such as scanners, CD’s, mirrors, lenses, telescopes, even ink jet print heads. PEC*PADs are available in two convenient sizes: The 4 x 4 inch (10 cm.sq.) wipes are perfect for cleaning 35mm film and other small areas as well as lenses and other sensitive optics, and the 9 x 9 inch (25 cm.sq.) wipes, which are best suited for larger film or print formats, murals, scanners, etc.