11.5x21x4 Air Filters for AC & Furnace | FilterKing

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11.5x21x4 Air Filter

AC Furnace Air Filter 11.5x21x4-Inches

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Product Description

Brand: Filter King
Filter size: 11.5x21x4
Actual Size: 11.5 x 21 x 4
4-Inch Filter
MERV 8 Filter Rating
Protection From: Pollen, Dust, Mold, Dust Mites, Bacteria, Pet Dander, Smoke, Viruses
Residential / Commercial Use