AprilAire 20 in. x 25 in. x 4 in. 213 MERV 13 Pleated Filter for Air Purifier Models 1210, 1620, 2210, 2216, 3210, 4200 (2-Pack) 213 02 - The Home Depot
Genuine Aprilaire 413 MERV 13 Filter Media Replacement For Models 2410, 4400 | eBay
AprilAire 16 in. x 25 in. x 4 in. 413 MERV 13 Pleated Filter for Air Purifier Models 1410, 1610, 2410, 2416, 3410, 4400 (1-Pack) 413 - The Home Depot
Replacement HVAC/Furnace Air Filter for AprilAire Air Purifier Model 1510 2516 | eBay