Filtrete 16-in W x 20-in L x 1-in Basic Flat Panel 2-Pack Basic Flat Air Filter in the Air Filters department at Lowes.com
PRO-SOURCE - Pleated Air Filter: 16 x 20 x 1", MERV 13, 80 to 85% Efficiency, Wire-Backed Pleated - 15164312 - MSC Industrial Supply
Filterbuy 16 x 20 x 1 Air Filter MERV 11, Pleated HVAC AC Furnace Filters Replacement | Wayfair
PRO-SOURCE 16 x 20 x 1", MERV 10, 55% Efficiency, Wire-Backed Pleated Air Filter Synthetic, Paperboard Frame, 300 Max FPM, 825 CFM, High Capacity, Use with Any Unit PRO10444 - 00626325 - Penn Tool Co., Inc
Basic Flat Panel 16" x 20" x 1" Air Filter 2 Pack | Theisen's Home & Auto
PureAir® 16" x 20" x 1" MERV 8 Allergen Air Filter - 6 Pack White-HVAC162086 | Frigidaire
SpiroPure 16X20.5X1 MERV 8 Pleated Air Filters - Made in USA (6 Pack) - Walmart.com