16 x 20" 'L' Sleeves
4 mil ARCHIVAL POLYESTER
16-1/4 x 20-1/4"(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.