Item Model Number: FKFB13X20X4A
Brand: Filter King Filter size: 13x20x4 Actual Size: 13 x 20 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: FKFA13X20X4A
Brand: Filter King Filter size: 13x20x4 Actual Size: 13 x 20 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: FKFD13X20X4A
Brand: Filter King Filter size: 13x20x4 Actual Size: 13 x 20 x 3.75 1-Inch Filter MERV 13 Filter Rating Protection From: Pollen, Dust, Mold, Dust Mites, Bacteria, Pet Dander, Smoke, Viruses Residential / Commercial Use
Item Model Number: FKFO13X20X4A
Brand: Filter King Filter size: 13x20x4 Actual Size: 13 x 20 x 3.75 MERV 10 Carbon Protection From: Pollen, Dust, Mold, Dust Mites, Bacteria, Smoke, Odor Residential / Commercial Use