Blake Purely Everyday Pocket Envelope C4 Peel and Seal Plain 115gsm Manilla (Pack 250). Catering for all sizes in wallet, pocket, gummed and self-seal envelopes. A range of paper grades available, all with excellent environmental credentials. Secure Peel and Seal Closure for ease of use, added security and extra shelf life. High Quality 115 gsm Paper. Perfect for business correspondence, letters, brochures and more. Suitable for brochures, catalogues etc.