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Standard 16 x 25 x 4 (3 5/8"). MERV 11 Rated, Compatible with 3M & Filtration Group Size. Case of 4 | Walmart Canada
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United Filter 20x25x4 MERV 11 Furnace Filters - Compatible with 3M Size - HVAC Filters Captures Airborne Dust, Pollen, Mould Spores & Smoke - Air Filters Made in Canada (Case of 4) :
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