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Merv 11 1" Furnace Filter Koch 1" Merv 11 Air Filter (12 Pack)

The Koch Multi-Pleat MERV 11 is a medium efficiency extended surface pleated panel filter, engineered to provide higher initial efficiencies and better overall performance than standard pleated filters.

Merv 11 2" Furnace Filter Koch 2" Merv 11 Air Filter (12 Pack)

The Koch Multi-Pleat MERV 11 is a medium efficiency extended surface pleated panel filter, engineered to provide higher initial efficiencies and better overall performance than standard pleated filters.

Merv 11 4" Furnace Filter Koch 4" Merv 11 Air Filter (6 Pack)

The Koch Multi-Pleat MERV 11 is a medium efficiency extended surface pleated panel filter, engineered to provide higher initial efficiencies and better overall performance than standard pleated filters.