Lennox Corporation X6667 Filter 21x26x4 MERV 10
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<b>[Product Information]</b><br>
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<li>Use in Lennox PureAir PCO-20C Air Cleaner</li>
<li>MERV 10 Efficiency to capture particles as small as 0.3 microns</li>
<li>Actual Size: 20-3/4" x 25-3/4" x 3-3/4"</li>
<li>Replace every 6 months in normal use</li>
<li>Genuine Lennox OEM Filter</li>
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