This P100 cartridge works with 3M™ Respirators. It can provide protection against contaminants up to 10 times the permissible exposure level (PEL) when used with half facepiece respirators, or up to 50 times the PEL when used with full facepiece respirators. It is 99.97% efficient against solid and liquid aerosols including oil. Cartridge can only be used alone.