Pad Refills (Pack of 6 Pads) - 21" x 23" x 1" Quantity:Default Finally they are factory made

Finally they are factory made so you don‰۪t have to deal with the hassle of trying to cut and size your custom air filters and they come with a full warranty

the "A+2000" brand Permanent Washable Electrostatic custom air filters are truly quality products

This is designed to fit into 1" Return Air Grilles

One way to overcome this problem is to increase the surface area of the filter media

the A+2000 uses no foam that may clog

Pad Refills (Pack of 6 Pads) - 21" x 23" x 1" Quantity:Default Finally they are factory madePACK 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.