3M 60921 Replacement Cartridges for Household Multi-purpose Respirator, Magenta, Black Provides a minimum of 99.97% filtration efficiency against solid and liquid aerosols, including oils and certain organic vapors Combined organic vapor cartridges with P100 particulate filter NIOSH approved: OV/P100 (when used with NIOSH approved face piece) 1 pair/pack Face piece not included. Must be purchased separately.