18x24x4 (17.5 x 23.5 x 3.75) AccumulairA (R) Gold 4-Inch Filter (APR 650)
AccumulairA (R) Gold MERV 8 20 times more efficient than ordinary fiberglass filters Captures small airborne particles such as fine dust, smoke, dander, mold and dust mites Designed for uniform airflow Lasts up to three months