Verified on November 6th, 2015

http://unitedfilter.com/index.php/default/5inch.html/

They offer climate control air cleaner. 20 x 25 x 5 furnace filter, 20 x 25 x 5 (4 3/8) furnace filter, 20 x 25 x 5 (5 1/4) furnace filter, 16 x 25 x 5 Furnace Filter , 16 x 25 x 5 (4 3/8) furnace filter