20x20x4 MicroMAX Air FilterMERV 11, Galv Frame, Koch 120-732-004 (3 pcs) 6K+6K+6K+9K+9K It incorporates a spring-return mechanism

It incorporates a spring-return mechanism with 24V power supply

This protector kit effectively shields your equipment

As a reliable part

Outdoor Sound Pressure as Low as 50 dB(A)

20x20x4 MicroMAX Air FilterMERV 11, Galv Frame, Koch 120-732-004 (3 pcs) 6K+6K+6K+9K+9K It incorporates a spring-return mechanismExtended Surface Minipleat Filter Minipleat Design Beverage Board or Metal Frame Efficiency Range60 65% (MERV 11) Compact 4 Depth Lightweight Construction The Koch MicroMAX is an extended surface minipleat filter designed for use in a wide variety of air filtration systems. The MicroMAX offers a unique combination of high efficiency and low pressure drop making it the ideal filter for use in any standard HVAC system. The added advantages of its