Pad Refills (Pack of 6 Pads) - 17 1/2" x 21" x 1" Quantity:Default The "Practical Pleat" media is

The "Practical Pleat" media is up to 28 times more effective at capturing particles than standard fiberglass panel filters

This design enables A+2000 custom air filters to maintain performance over the years

degrade and restrict air flow

Available in packs of 4

the more efficient a filter is at removing particles

Pad Refills (Pack of 6 Pads) - 17 1/2" x 21" x 1" Quantity:Default The "Practical Pleat" media isPACK 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.