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Expandable Self-Seal Envelopes
Expandable self-seal envelopes are ideal for mailing bulky documents, catalogs, and items that require extra space. These durable envelopes feature a flexible gusset that expands to hold more contents while maintaining structural integrity. With a convenient peel-and-seal closure, they ensure a secure, tamper-evident seal without the need for additional adhesive. Perfect for businesses, mailrooms, and e-commerce packaging.
