Pad Refills (Pack of 6 Pads) - 21 1/2" x 23" x 3/4" Quantity:Default Because we specialize in custom

Because we specialize in custom air filters

In general

the more efficient a filter is at removing particles

We can make custom air filters in heights and widths ranking from 6 inches to 36 7/8 inches with increments in 8ths of an inch

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

Pad Refills (Pack of 6 Pads) - 21 1/2" x 23" x 3/4" Quantity:Default Because we specialize in customPACK 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.