Hard Board Backed Envelopes C3 Brown Manilla Peel & Seal | C3 (457x324mm) Please Do Not Bend | Pack of 500

• RIGID HARDBOARD PROTECTION – C3 (457x324mm) Brown Manilla board backed envelopes with a 1000-micron solid cardboard backing; keeps A3 documents, photos, certificates and artwork perfectly flat and crease-free throughout transit
• PEEL & SEAL CLOSURE – Quick, mess-free peel and seal adhesive strip creates a tamper-evident, watertight-resistant seal; no gum-licking, tape or glue needed; ideal for high-volume posting and professional mailing
• PLEASE DO NOT BEND PRINTED – 'Please Do Not Bend' printed prominently on the front of every envelope to alert postal workers and couriers; provides an extra layer of protection for irreplaceable documents and photographs
• ECO-FRIENDLY RECYCLED MATERIAL – Made from 100% recycled kraft paper and cardboard; fully recyclable after use; sustainably sourced material without compromising on strength or rigidity
• PACK OF 500 – Bulk pack of 500 Brown Manilla C3 (457x324mm) board backed envelopes; suitable for home, office and e-commerce dispatch; compatible with Royal Mail Large Letter and standard postal services

Protect your important documents with our C3 (457x324mm) Brown Manilla hard board backed envelopes. Designed to hold A3 paper flat and crease-free in the post, each envelope features a rigid 1000-micron cardboard backing and 120gsm kraft paper front for outstanding rigidity. The easy peel and seal strip creates a tamper-proof, secure closure in seconds — no water or glue required. 'PLEASE DO NOT BEND' is printed clearly on the front to alert postal workers and couriers. Made from 100% recycled materials and fully recyclable. Ideal for mailing certificates, photographs, artwork, legal documents, contracts, CVs, greeting cards and more. This pack contains 500 envelopes. Suitable for Royal Mail Large Letter services (subject to weight). Perfect for home, office, and e-commerce use.