A nice vintage wooden shipping crate / box for a dozen pairs of Big 4 barn door rollers. We found it tucked away in the rafters of an old hardware store. It is still a sturdy piece and would be great for storage. You could add handles to the sides to make it even more functional. We gave the wood a coat of clear lacquer to protect it.
The Big 4 barn door rollers were made by the National Mfg. Company of Sterling, Illinois.
The outside dimensions are 16 ½ inches long, 13 inches wide and 11 ¼ inches tall. The inside dimensions are 14 inches long, 13 inches wide and 10 ½ inches tall