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21x26x4 (21.25x26x4) MERV 16 Lennox OEM PCO-20C High Capacity Replacement Filter

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Lennox Part #X6669 Genuine OEM Lennox MERV 16 microglass filter

• Fits model #PCO-20C.
• Nominal size 21" x 26" x 4" (Actual size 21 1/4" x 26" x 4")
• Provides near-perfect filtration performance.

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