Pad Refills (Pack of 6 Pads) - 18 1/2" x 18 1/2" x 1" Quantity:Default Either way

Either way

so it can provide a lifetime of dependable service

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

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

The permanent frame is constructed of space-age plastics that are resistant to corrosion

Pad Refills (Pack of 6 Pads) - 18 1/2" x 18 1/2" x 1" Quantity:Default Either wayPACK 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.