Aerostar 20x26x4 Replacement Whole House Filter for Aprilaire 213 Air Systems with Collapsible Design

Featuring a MERV 13 media that filters out dust, pollen, bacteria and viruses, and more particles from the air before it goes into your compatible Aprilaire Model 213 Whole House Air Purifier and Filtration system. Collapsible design sets up in seconds for easy installation and storage. Breathing healthier, cleaner air has never been easier with Aerostar Replacement Air Filters.