MJ Roop was a company that sold these boxes and slipcased binders to collectors. They went out of business a few years ago. Basically they took the same products offered by aboxcompany and archivalmethods (binders) and added a few bells and whistles- the checklist and screenprinting.
IMO you're better off creating the checklist yourself and having it laminated. The couple I have from Roop were full of errors and typos.
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