Gaylord Archival Nesting Storage Box Designed to nest inside Gaylord Archival Record Storage Boxes (sold separately) Archival-quality, B-flute corrugated board box is acid-free, lignin-free and buffered to resist acid migration; passed P.A.T. (Photographic Activity Test) Your family history and collectibles deserve the same level of protection used by the world's leading cultural institutions Two (two levels of one) 11 3/4W x 14 1/4L x 4 3/4"H boxes will fit in one Gaylord Archival Record Storage Box; all boxes sold individually For added protection, use with Gaylord Archival Tissue Paper (sold separately)