Electron Microscopy Data Bank 3D volume data (map.gz).
You will need software to extract the contents. Dynabrade 52410 15000 RPM user manual - Internet Archive 52410 rar
Based on your query "52410 rar", the results indicate that "52410" is a commonly used identifier for several specific, non-related technical items rather than a single widely known file. Electron Microscopy Data Bank 3D volume data (map