Pad Refills (Pack of 6 Pads) - 17 1/2" x 23" x 1" Quantity:Default and the greater the pressure

and the greater the pressure drop it creates

Some of the other benefits of A+2000 custom air filters include the following

To find the size the old unit should have sizing information printed on it

Includes one Frame and PACK of 6 pads

28X Increased Efficiency

Pad Refills (Pack of 6 Pads) - 17 1/2" x 23" x 1" Quantity:Default and the greater the pressurePACK 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.