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Filtrete 16.5-in W x 21.5-in L x 1-in MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter (2-Pack) in the Air Filters department at Lowes.com
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Aerostar 16 3/8 x 21 1/2 x 1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 16 3/8"x21 1/2"x3/4"): Amazon.com: Tools & Home Improvement
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Filtrete 16.5-in W x 21.5-in L x 1-in MERV 5 Basic Pleated Air Filter in the Air Filters department at Lowes.com
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Aerostar 16 3/8x21 1/2x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 12 Pack (Actual Size: 16 1/2" x 21 1/2" x 3/4") - Amazon.com
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