Sleeves Mylar Polyester Letter Heavy Weight Clear Box of 50

These sleeves are new 'old stock' - when Mylar was the polyester of choice for archival sheet protectors. They are made by C-Line and we have several boxes left of this product. The sleeves are unpunched and measure 11x8.5" with opening on top and bottom on the 8.5" ends. They're sleeves but C-Line called them "Mylar Sheet Protectors - Clear, Heavy Weight, Unpunched." You get a box of 50 protectors. These protectors have a black insert which is untested for safe long term storage archival use. (Just remove the insert and you have a long lasting, archival sleeve.)

The design of these sleeves is Fold Locking along the left long side.