Pad Refills (Pack of 6 Pads) - 21" x 23 1/4" x 1" Quantity:Default The Pad and Frame Air

The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts

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The "Practical Pleat" contains over 500% greater surface area than a MERV 10 one-inch pleat

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Pad Refills (Pack of 6 Pads) - 21" x 23 1/4" x 1" Quantity:Default The Pad and Frame AirPACK of 6 pads for Pad and Frame Air Filters Filtering inserts are anti microbial and are more efficient in capturing particles, such as dust, ragweed, pollen, etc., from the air stream, than standard fiberglass filters purchased at retail outlets. Filtering inserts are shipped in an easily stored packet.