Pad Refills (Pack of 6 Pads) - 23" x 24 1/4" x 1" Quantity:Default these can be purchased in

these can be purchased in any conceivable size

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

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You may know them as washable air or even permanent air filters

Any Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop

Pad Refills (Pack of 6 Pads) - 23" x 24 1/4" x 1" Quantity:Default these can be purchased inPACK 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.