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18x20x1

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4	6	12	48	72	120

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18x20x1

17.75x19.75x1

MERV 11

$14.95

$13.46

$13.16

$12.71

$11.21

$10.47

18x20x1

17.75x19.75x1

MERV 13

$19.66

$17.69

$17.30

$16.71

$14.75

$13.76

18x20x1

17.75x19.75x1

MERV 8

$12.71

$11.44

$11.18

$10.80

$9.53

$8.90

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18x20x1

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