Pure Enrichment 8-3/4 in H x 8-3/4 in W Square HEPA Air Purifier Filter 1 Pack

3-stage air filtration Pre-filter captures initial dust and allergen particles Activated carbon filter absorbs formaldehyde, benzene and other noxious gases Hepa filter captures dust, smoke, pollen and other allergens Breathe easier purifies the air for easier breathing and more restful sleep Use up to 6 months for optimal performance