$65.99 Aprilaire - 213 A2 213 Replacement Air Filter for Whole Home Air Purifiers, Healthy Home Allergy 
Aprilaire 213 Replacement Air Filter Whole Home Purifier Allergy MERV 13 4 Pack Heating, Cooling 
Aprilaire Filter #213 for Models 1210, 2210, 3210 and 4200 --- 8 Pack - Walmart.com - Walmart.com
