Pad Refills (Pack of 6 Pads) - 20" x 24" x 3/4" Quantity:Default some just refer to them

some just refer to them as electrostatic filters

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built to last a lifetime

oxidation and deterioration

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

Pad Refills (Pack of 6 Pads) - 20" x 24" x 3/4" Quantity:Default some just refer to themPACK 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.