19x21x4 (18.5 x 20.5 x 3.63) Magnet 4-Inch Filter (MERV 11) 2 filter pack
The Accumulair Platinum has uniform pleat shape enhances dust holding capacity and maximizes air flow. Up to 30-times more efficient at capturing allergens than ordinary fiberglass filters. Heavy duty construction frame prevents airflow bypass. Lasts UP TO 3 months! Proudly made in USA.