Clairefontaine - Ref 5586C - Pollen Adhesive Envelopes (Pack of 20) - C6 Sized, 120gsm Paper, Printer-Compatible, Acid Free, Adhesive Strip for Easy Seal - Intensive Red : Amazon.co.uk: Stationery & Office Supplies
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Golden State Art, Infinity 4x6 Photo File Box with 12 Acid-Free Envelopes, Lignin-Free Storage Boxes, Holds Up To 1000 3.5" x 5", or 4" x 6" Pictures, for Storing Artwork Prints Negatives-Tan :