$56.99 Aprilaire 413 Filter Single Pack for Air Purifier Models 1410, 1610, 2410, 3410, 4400, Space 
Aprilaire 1410 16-Inch H x 25-Inch W - Media Air Cleaner - MERV 11
Aprilaire 413 Filter 2 Pack for Air Purifier Models 1410, 1610, 2410, 3410, 4400, Space-Gard 
