Pad Refills (Pack of 6 Pads) - 21 1/4" x 21 1/4" x 3/4" 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

This is designed to fit into 1" Return Air Grilles

Includes one Frame and PACK of 6 pads

We look forward to delivering our American-made

Because we specialize in custom air filters

Pad Refills (Pack of 6 Pads) - 21 1/4" x 21 1/4" x 3/4" 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.