: The .7z suffix suggests a 7-Zip compressed archive .
If you are looking for a specific document, could you clarify or what topic the "paper" is supposed to cover? 0001292814-16-006275.txt - SEC.gov Rox.7z
⚓ : There is no commercial printing paper brand named "Rox.7z." It is almost certainly a file extension for a compressed document or a catalog code from a stamp collecting reference. Rox.7z
: Often denotes a specific catalog sub-number or printing variety. Rox.7z
: These catalogs usually describe paper as "medium," "thick," or "wove" rather than using "Rox.7z" as a paper name itself. Technical Data and SEC Filings