A 4 mil polyester film, coated on both sides that is designed to work with the Oce 9800, TDS800 and other xerographic equipment. Dimensionally stable, durable and water resistant. Matte both sides. Good toner adhesion, uniform solid fill, good copy quality. Good copier performance overall. Physical properties: White, 4.0 mil, 34% opaque, 56 white, 50 10 smooth, non-erasable, not acid-free.