Catering for all sizes in wallet, pocket, gummed and self-seal envelopes. A range of paper grades available, all with excellent environmental credentials. Easy to use Self Seal closure High quality 80 gsm paper Perfect for business correspondence, letters, brochures and more. Ensure all documents are safely secured with our Press Seal envelopes. This pack contains a box of 1000. 23.5 x 23.5 Manilla Press Seal 80gsm Box of 1,000 Includes window.