Eco-Aire P25S.0121D21D MERV 13 Pleated Air Filter, 21 1/4 x 21 1/4 x 1"
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<b>[Product Information]</b><br>
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<li>Actual Size: 21 1/4" x 21 1/4" x 3/4"</li>
<li>Change Every 60-90 Days</li>
<li>MERV 13 Rated</li>
<li>Pleated Material</li>
<li>Brand New, Factory Sealed</li>
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