filtrete micro allergen defense hvac air filter, guaranteed airflow up to 90 days, mpr 1000, 20 x 20 x 1, 6-pack

Designed with Filtrete Brand 3-in-1 technology from 3M to pull in and trap unwanted air particles while letting clean air flow through Microparticle Performance Rating 1000 Outperforms fiberglass, washable and non-electrostatic pleated 1' filters Lasts up to 3 months For residential use only Manufactured by 3M