3M 8511PB1-A-PS Particulate N95 Respirator with Valve, 10-Pack

Filter-Monster brand replacement for Therapure TPP440FL. Fits Envion Therapure model TPP440 Permanent HEPA Type Air Purifier. This filter is cleanable, long lasting, and high performance. Filter TPP440 also fits Therapure models TPP 540 and TPP 640, but does NOT fit Therapure model TPP240 or TPP220.

Compatibility: Compatible with Therapure TPP440F filters. Engineered to fit Therapure Envion air purifier models TPP440, TPP540, and TPP640.
Air Quality Improvement: True HEPA filtration is rated H13 and removes up to 99.97% of airborne particles as small as 0.3 microns in size including dust, smoke, pollen, pet hair and dander, mold spores and dust mites.
Airtight Seal: Foam gasket seal for high performance filtration directs air through the filter and keeps air from escaping around the sides.
Compatibility: Compatible with Therapure TPP440F filters. Engineered to fit Therapure Envion air purifier models TPP440, TPP540, and TPP640.
Air Quality Improvement: True HEPA filtration is rated H13 and removes up to 99.97% of airborne particles as small as 0.3 microns in size including dust, smoke, pollen, pet hair and dander, mold spores and dust mites.
Airtight Seal: Foam gasket seal for high performance filtration directs air through the filter and keeps air from escaping around the sides.

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Filter-Monster – Replacement HEPA Filter – Compatible with Therapure TPP440F Filter for Therapure Air Purifier TPP440, TPP540, and TPP640 Air Purifiers;