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Filters Fast 18x30x1 Air Filter MERV 8, 1 Ac Furnace Air Filters, Made in the USA, Actual Size: 1775x2975Ax075A, 6 Pack
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Filters Fast 18x30x1 Air Filter MERV 11, 1" AC Furnace Air Filters, Made in the USA, Actual Size: 17.75"x29.75"x0.75, 6 Pack - Amazon.com
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Filterbuy 18x30x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 11) | eBay
Filterbuy 18x30x1 MERV 11 Pleated HVAC AC Furnace Air Filters (4-Pack) - Walmart.com
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Amazon.com: Filterbuy 18x30x1 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 17.75 x 29.75 x 0.75 Inches) : Tools & Home Improvement
