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1/2 INCH FURNACE FILTER

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21x21x0.5 (20.5x20.5x0.5) Accumulair Diamond 1/2-Inch Filter (MERV 13) 21.5x23.25x0.5 (Actual Size) Accumulair Diamond 1/2-Inch Filter (MERV 13)
ONLY: $21.41 each - FREE SHIPPING + SAVE When You Order More
21x21x0.5 (20.5x20.5x0.5) Accumulair Diamond 1/2-Inch Filter (MERV 13) 21x21x0.5 (20.5x20.5x0.5) Accumulair Diamond 1/2-Inch Filter (MERV 13)
ONLY: $19.27 each - FREE SHIPPING + SAVE When You Order More
20x24x0.5 (19.5x23.5x0.5) Accumulair Diamond 1/2-Inch Filter (MERV 13) 20x24x0.5 (19.5x23.5x0.5) Accumulair Diamond 1/2-Inch Filter (MERV 13)
ONLY: $16.95 each - FREE SHIPPING + SAVE When You Order More
22x26x0.5 (21.5x25.5x0.5) Accumulair Diamond 1/2-Inch Filter (MERV 13) 22x26x0.5 (21.5x25.5x0.5) Accumulair Diamond 1/2-Inch Filter (MERV 13)
ONLY: $19.27 each - FREE SHIPPING + SAVE When You Order More
16x25x0.5 (15.5x24.5x0.5) Accumulair 1/2-Inch Filter (MERV 13) 16x25x0.5 (15.5x24.5x0.5) Accumulair 1/2-Inch Filter (MERV 13)
ONLY: $17.84 each - FREE SHIPPING + SAVE When You Order More