Storage Boxes for 5 x 7" Postcards/Photos.
5-1/2 x 7-1/2 x 12" Each box stores up to 450 postcards/photos.
These Museum Grade archival photo boxes are lignin-free, acid-free, buffered and have a pH of 8.0-9.0. They have passed the Photo Activity Test for safe, indefinite storage of photos. They come with metal-reinforced corners which provide extra strength for stacking.