Item #3280679 | Allergen Shield OEM Part #PF3P181801AT-4
18 x 18 x 1 (4 Pack) Allergen Shield Plus Filter with Antimicrobial Layer. Also fits 2" openings.
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This New & Innovative filter uses 3 Dimensionally layered Materials to capture more dust and allergens then most 'Paper' filters. The '4 Pack' is typically a 1 year supply.
