$56.99 Aprilaire 413 Filter 2 Pack for Air Purifier Models 1410, 1610, 2410, 3410, 4400, Space-Gard 
Deep Pleated MERV 13 Media Filter for Model 1410 1610 2410 2416 4400 2400 & 2140
Aprilaire Filter #213 for Models 1210, 2210, 3210 and 4200 --- 8 Pack - Walmart.com - Walmart.com
