12 x 18" 'L' Sleeves 4 mil ARCHIVAL POLYESTER 12-1/4 x 18-1/4" (outside dimensions).
These L-Seal Envelopes are made from crystal-clear archival Polyester, approved by the Library of Congress. Their rigidity (4 mil) and unique construction (two adjacent sealed sides) allows for quick/safe insertion and removal of photos/prints when not in permanent storage.
12-1/4 x 18-1/4". 4 mil POLYESTER.
Sealed on 2 adjacent sides."/>