Pad Refills (Pack of 6 Pads) - 17 1/2" x 21" x 1" Quantity:Default the A+2000 uses no foam

the A+2000 uses no foam that may clog

The A+2000 line is easy to maintain with no need to buy oils or adhesives to enhance effectiveness

This is a 5" MERV 10 HIGH PERFORMANCE AIR FILTER

than standard fiberglass filters purchased at retail outlets

Unlike some permanent custom air filters

Pad Refills (Pack of 6 Pads) - 17 1/2" x 21" 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.