Item Model Number: FKFB20X27X4A
Brand: Filter King Filter size: 20x27x4 Actual Size: 20 x 27 x 3.75 4-Inch Filter MERV 8 Filter Rating Protection From: Pollen, Dust, Mold, Dust Mites, Bacteria, Pet Dander, Smoke, Viruses Residential / Commercial Use
Item Model Number: FKFA20X27X4A
Brand: Filter King Filter size: 20x27x4 Actual Size: 20 x 27 x 3.75 4-Inch Filter MERV 11 Filter Rating Protection From: Pollen, Dust, Mold, Dust Mites, Bacteria, Pet Dander, Smoke, Viruses Residential / Commercial Use
Item Model Number: FKFD20X27X4A
Brand: Filter King Filter size: 20x27x4 Actual Size: 20 x 27 x 3.75 4-Inch Filter MERV 13 Filter Rating Protection From: Pollen, Dust, Mold, Dust Mites, Bacteria, Pet Dander, Smoke, Viruses Residential / Commercial Use
Item Model Number: FKFO20X27X4A
Brand: Filter King Filter size: 20x27x4 Actual Size: 20 x 27 x 3.75 MERV 10 Carbon Protection From: Pollen, Dust, Mold, Dust Mites, Bacteria, Smoke, Odor Residential / Commercial Use