Aerostar 16x24x4 MERV 13, Pleated Air Filter, 16 x 24 x 4, Box of 6, Made in the USA - Amazon.com
Filtrete 16-in W x 25-in L x 4-in MERV 11 1000 MPR Allergen Defense Electrostatic Pleated Air Filter (2-Pack) in the Air Filters department at Lowes.com
Silver 94% 4" Electrostatic Washable HVAC Furnace Filter 24" x 24" x 4"
16" x 24"x 4" MERV 13 Air Filters - Only $32.13 Each!
hvac - Should I replace this 4" furnace filter with a 5" one? - Home Improvement Stack Exchange
Air Handler 5W979 16" x 24" x 2" Pleated Furnace Air Filter BOX OF 12 | eBay
16x24x4 Furnace Filters - MERV 11 - Case of 4 - Free Shipping - United Filter
Filterbuy 16 x 24 x 4 Air Filter MERV 13, Pleated HVAC AC Furnace Filters Replacement | Wayfair