iDEALS UK PACKAGING LTD Capacity A3 Size Cardboard Mailer Envelopes, 321x467mm, Strong F-Flute, Expandable to 50mm, Pack of 25

• DIMENSIONS: A3 size mailer measuring 321x467mm, perfect for sending documents, artwork, and other large-format materials securely.
• EXPANDABLE DESIGN: Features 50mm expansion capability to accommodate thicker items while maintaining structural integrity.
• STURDY CONSTRUCTION: Made with strong F-flute cardboard material providing excellent protection during transit and handling.
• CONVENIENT CLOSURE: Equipped with peel-and-seal adhesive strip for quick and secure sealing without additional tape.
• BULK PACKAGING: Contains 25 mailers per pack, ideal for businesses, offices, or frequent shippers handling A3 materials.

These robust A3 cardboard mailer envelopes offer professional-grade protection for your valuable documents and materials. Each envelope measures 321x467mm and features strong F-flute construction that provides excellent cushioning and structural integrity. The innovative expandable design allows contents up to 50mm in thickness, making these mailers versatile enough for books, catalogs, artwork, or multiple documents. The convenient peel-and-seal closure ensures quick, secure packing while the kraft brown finish maintains a professional appearance. Perfect for businesses, artists, and anyone needing reliable document shipping solutions, this pack of 25 mailers delivers consistent performance for your shipping needs. The durable construction helps protect contents from bending and impact during transit, while the practical dimensions accommodate A3-sized materials with room to spare.