Filtrete - 12 in. W X 36 in. H X 1 in. D 1000 MPR Pleated Allergen Air Filter 1 pk

Designed to fit tall, narrow returns, this 12 x 36 x 1-inch Filtrete Allergen Defense filter uses pleated electrostatic media with 3‑in‑1 technology to improve whole‑home air quality through your furnace or central AC system. With a 1000 MPR (MERV 11) rating, it helps capture microscopic particles such as pet dander, smoke, and smog, plus larger allergens, including lint.