C3 Gusset Envelopes (375 Pack) – Strong Brown Manilla A3 (140gsm, 30mm Thick, Expanding Width)

The C3 Gusset Envelopes offer flexibility and strength for your mailing needs. Made from durable 140gsm brown manilla, they expand up to 30mm, fitting A3 documents, binders, and more. Measuring approximately 450mm x 324mm, they provide ample room without adding bulk. These envelopes protect items in transit while keeping postage costs low. Choose this 375-pack for reliable, adaptable mailing solutions!

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