http://www.shopbrodart.com/library-supplies/archival-supplies/archival-storage-boxes/Archival-Specialty-Storage-Boxes/_/Post-Card-Boxes/

N.B. presuming the 4 1/8" H dimension is even the outer dimension, this means that one can't easily keep tab cut dividers which often go from 4 3/8" to 4 1/2" tall in these boxes with the lids on properly.

Instead, one may prefer their slightly larger microfiche boxes which go up to 4 3/4" which should also presumably fit their microfiche divider guides for sectioning one's work.

Another subtle difference in these two boxes is that the smaller is 60-pt paper versus 40-pt for the larger microfiche box, which means that while sturdy, isn't quite as sturdy.