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4 inch Furnace Filter

4 Item(s)

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  1. 20x20x4 MERV 11

    20x20x4 MERV 11

    Actual Size
    19-1/2 x 19-1/2 x 3-3/4
    Case of 4
    $74.99
    Part
    UF11-42020-4
  2. 20x20x4 MERV 13

    20x20x4 MERV 13

    Actual Size
    19-1/2 x 19-1/2 x 3-3/4
    Case of 6
    $119.99
    Part
    UF13-42020
  3. 20x20x4 MERV 11

    20x20x4 MERV 11

    Actual Size
    19-1/2 x 19-1/2 x 3-3/4
    Case of 6
    $89.99
    Part
    UF11-42020
  4. 20x20x4 MERV 8

    20x20x4 MERV 8

    Actual Size
    19-1/2 x 19-1/2 x 3-3/4
    Case of 6
    $79.99
    Part
    UF8-42020

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