The Daikin-McQuay SQM13A25 is a set of six disposable MERV 13 air filters designed for high-efficiency air filtration in HVAC systems. Made with electrostatically charged synthetic media, these filters capture airborne dust, pollen, and other fine particles as air passes through them. Measuring 27.6" x 8" x 4.375", they are used in Daikin-McQuay DFBS filter cabinets serving compatible... https://www.partshnc.com/sqm13a25-daikin-mcquay-27-6-x8-x4-375-filter-qty-6