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20x20x1 (19.7 x 19.7) Filtrete 1700 Ultimate Allergen Reduction Filter by 3M
- Filtrete 1700 Performance Rating.
- No competitors 1" filter performs better.
- 93% effective at capturing large airborne allergens, such as pollen, mold spores and dust mite debris.
- Also captures small particles such as smoke, smog, household dust, pet dander, bacteria and particles that can carry viruses and tobacco smoke odors.
- Lasts up to 3 months.
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