Pad Refills (Pack of 6 Pads) - 16 5/8" x 21 1/4" x 3/4" Quantity:Default if not you can measure

if not you can measure it or check the HVAC unit and the owner‰۪s manual

You may know them as washable air or even permanent air filters

Because we specialize in custom air filters

Filtering inserts are shipped in an easily stored packet

28X Increased Efficiency

Pad Refills (Pack of 6 Pads) - 16 5/8" x 21 1/4" x 3/4" Quantity:Default if not you can measurePACK 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.