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16x20x1 Filter - Multi-Pleat XL11™ manufactured by Koch Filter*Made in the USA!*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity models available.(More info on MERV 11 Filters) SOLD AS A CASE OF 12 FILTERS
16x20x1 Filter - Multi-Pleat XL8™ manufactured by Koch Filter*Made in the USA!*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity models available. (More info on MERV 8 Filters) SOLD AS A CASE OF 12 FILTERS