Archival standard for flat filing, ideal for storage of prints, film, documents and more Clamshell design (hinged on one long side with a thumb cut) provides easier access and retrieval of stored objects Gray exterior and white 60 pt. boxboard construction/interior Black metal edges add strength and durability Extra 1/2" interior dimension will fit all style of sleeves, pockets and bags Passed PAT - completely safe for long-term storage and proudly made in the US