Product details:

Help your home breathe better with the Lennox X6673 MERV 11 Furnace Filter. It's easy to install and made with high-quality materials for reliability. This Lennox furnace filter is electrostatically charged to grab onto dust, pollen, pet dander and other particles as tiny as 0.3 microns. The synthetic media helps air pass through unhindered and is made to UL 900 standards. This 20 x 25 x 5 furnace filter comes in a two-pack.

Brand:Lennox
manufacturer_part_number:x6673
Assembled Product Dimensions (L x W x H):20.00 x 25.00 x 5.00 Inches