Pad Refills (Pack of 6 Pads) - 21" x 23" x 1" Quantity:Default the A+2000 uses no foam

the A+2000 uses no foam that may clog

You never have to hassle with disposable filters that will end up in a landfill again

This is designed to fit into 1" Return Air Grilles

Instead of face loading (particles captured on the outer surface of the filter)

Filtering inserts are anti-microbial and are more efficient in capturing particles

Pad Refills (Pack of 6 Pads) - 21" x 23" x 1" Quantity:Default the A+2000 uses no foamPACK 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.