Pad Refills (Pack of 6 Pads) - 16 3/8" x 21 1/2" x 1" Quantity:Default the greater it's resistance to

the greater it's resistance to airflow

The "Practical Pleat" contains over 500% greater surface area than a MERV 10 one-inch pleat

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

This is a 5" MERV 10 HIGH PERFORMANCE AIR FILTER

The SpeedLight uses powerful magnets to hold the mounting plate in place

Pad Refills (Pack of 6 Pads) - 16 3/8" x 21 1/2" x 1" Quantity:Default the greater it's resistance toPACK 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.