For maximum rigidity and clarity. Use with GBC Models 13 Pro, 3500, 4500, and DocuSeal´┐Ż Models 400 and 1200. NOTE: For best results with all films, the use of a carrier is highly recommended. Carriers are included with pouches. Length: 11 1/2 in; Width: 9 1/2 in; For Use With: N/A; Thickness/Gauge: 10.0 mil.