Pad Refills (Pack of 6 Pads) - 21 1/4" x 21 1/4" 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

the greater it's resistance to airflow

built to last a lifetime

some just refer to them as electrostatic filters

the A+2000 uses no foam that may clog

Pad Refills (Pack of 6 Pads) - 21 1/4" x 21 1/4" 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.