For maximum rigidity and clarity. Use with GBC Models 13 Pro 3500 4500 and DocuSeal® 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 1/2in; Width: 9 1/2in; Thickness/Gauge: 10 mil; Laminator Supply Type: Letter.