ParticleMax P3 Filter - Virus Protection Respirator Filters (6 Pack) 1984 these magnets come in a

these magnets come in a square shape

Particle filters provide protection against solid and liquid particles

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ParticleMax P3 Filter - Virus Protection Respirator Filters (6 Pack) 1984 these magnets come in aCombining cutting edge ultra low particulate air (ULPA) filtration with 40 mm standard NATO threading, these P3 certified biofilters work with your existing NBC CBRN gas mask to provide unparalleled, long lasting protection from airborne viral and bacterial threats. These respirator filters are vastly superior to common half face masks in practically every scenario. Please Note: This bundle comes with 6 P3 filters in total. Key Features of ParticleMax