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 :
4x6" photograph envelopes for safe long term archival storage. - Preservation Equipment Ltd
Coin Envelopes made from acid-free, white paper, 50 x 50 mm - pack of 100