$67.99 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
Aprilaire 213 (2-Pack) - 20 x 26 x 4 Expandable Air Filter, MERV 13 - Walmart.com
