K&N 16-in W x 20-in L x 1-in Washable 11 MERV Pleated Air Filter in the Air Filters department at Lowes.com
4-Pk) Kirkland Signature High Performance Furnace Filters 16" x 20" x 1" 2200 | eBay
Koch Air Filter 16 x 20 x 1 MERV 13 Pleated Air Filter - 12 Pack - HepaFilterSales.com -- We Deliver Breathing Easier
Honeywell 16 x 20 x 1 Elite Allergen Pleated MERV 13 - FPR 10 Air Filter 91001.011620 - The Home Depot
HDX 16 in. x 20 in. x 1 in. Superior Pleated Furnace Air Filter FPR 9, MERV 12 HDX1P9-011620 - The Home Depot
Amazon.com: No Toil Castle, One-Year HVAC Furnace Filter, 16” x 20” x 1”, black : Tools & Home Improvement
HDX 16 in. x 20 in. x 1 in. Standard Pleated Furnace Air Filter FPR 5, MERV 8 (3-Pack) HDX3P5-011620 - The Home Depot
FRESHLAB 16 x 20 x 1 Air Filter for AC HVAC Furnace, MERV 11, MPR 1000, Assembly Kit with 1 Reusable ABS Frame & 8 Filters, Actual Size: 15.7" x 19.7" x 0.8" - Walmart.com