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MERV Rating
MERV 8 (1)
MERV 11 (1)
MERV 13 (1)
Nominal Length
21 (1)
Nominal Width
21 (1)
Nominal Depth
4" (1)
21x21x4 Air Filter
Nominal Size
Actual Size
Merv Rating
Bulk Quantity Pricing
4
6
12
48
72
120
Quantity
21x21x4
20.5x20.5x4
MERV 13
$22.87
$20.58
$20.13
$19.44
$17.15
$16.01
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