Regular Postcard 'Folder' Sleeves. 5-11/16 x 3-13/16" 4 mil POLYESTER (Mylar). Sealed on one long edge. Indefinite storage.
Details
Regular Postcard 'Folder' Sleeve
4 mil ARCHIVAL POLYESTER
5-11/16 x 3-13/16"
Made from crystal-clear archival Polyester (Mylar), approved by the Library of Congress for INDEFINITE STORAGE. Their rigidity (4