Feature●3-20x25 Air Ranger Air Cleaner Replacement Filters●Actual Filter Size 18.5x22.5●Activated Full Carbon Center & Removes Orders, off gassing, Smoke, Dust, Candle Soot, Ozone free and More●Replace Every 1 to 4 Months: Depending Local air quality for optimal performance.●Manufactured By Fast-Shipped-Filters●Fast Shipped Filters is a family-owned business that has been in the Heating Cooling & Air Purification industry since 1984Description 3-20x25 Air Ranger Air Cleaner Replacement Filters ( Actual Filter Size 18.5x22.5 ) Fast-Shipped-Filters