Lennox Model X0583 Air Cleaner Filter Media – 16″ x 25″ x 5″ (2-Pack) FEATURES: Factory original BMAC Healthy Climate Media Electrostatically charged disposable media Captures dust mites, pollen, mold spores, pet dander and other contaminants down to 0.3 microns Synthetic media offers large surface area for maximum dirt holding capacities with minimum air resistance Media is certified to UL 900 standard. UL classification – Class 2 Replace every 6 months under normal use SPECIFICATIONS: Nominal Dimensions: 16″ X 25″ X 5″ Actual Dimensions 16″ X 24 3/4″ X 4 3/8″ MERV 10 Same as Honeywell F25F1042, F35F1008, F100F1012, F150E1026, F200E1029, F25F1000, F100A1029, 2037719, FC35A1001