3M 5P71 Review: P95 Prefilter for 3M Cartridges (501 Retainer)
The 3M 5P71 is a P95 oil-resistant particulate prefilter disc that snaps under the 501 retainer over a 3M gas cartridge to add particulate protection and extend cartridge life. This 3M 5P71 review covers what it does, which respirators it fits, and how it compares to the 5N11, 2091 and 2097 filters.
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