4 mil. Double Matte Erasable Inkjet Film A premium inkjet film that provides a 20% faster reprint speed than its lighter 3 mil. counter part 7923D. A durable and archivable 4 mil. film specially coated for superior monochrome lines and fine details, and even light color ink line coverage. Outstanding line formation while drying quickly with excellent erasability. (25 Sheet per pack) Caliper - 4.0 mil Opacity - 53% Smoothness - 75