18x20x4 Filters

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What Our Customers Have to Say

Lloyd C. 1 day ago
5
I have not been able to find this size in any store. Discount Filter had it.
Julie O. 1 day ago
5
A+ Excellent service and excellent product!
Ronald f. 2 days ago
5
I need new ones
Aaron 2 days ago
5
This product works as well as the original.