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10 Large A4 C4 Size Strong Hard Board Backed Envelopes 'Do Not Bend' Peel + Seal - 229 x 324mm / 9 x 12.75" Rigid Postal Packing Mailing Shipping Postage Posting Self
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Hard Board Backed Envelopes Peel & Seal Mailing Posting & Storing Documents Manilla Do Not Bend Cardboard Secure Postal Envelope (C6 (162x114mm), 10 Envelopes) : Amazon.co.uk: Stationery & Office Supplies
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Triplast 20 x A4 C4 Manilla Hard Board Back Envelopes (324 x 229mm) - Cardboard Backed Please Do Not Bend Envelope with Peel & Seal Strip - Perfect for Mailing, Posting &
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