Filter Kit, Filter Type Pleated, Actual Depth 2 1/2 in, Actual Height 11 11/16 in, Actual Width 18 3/16 in, Compatible Grainger Part Number 2YGA6, Compatible Manufacturer Model Number TRIO1000, TRIO1000P, TRIO1000P2, Number of Filters 2, Media Material Activated Carbon, Polyester, Nominal Depth 2 1/2 in, Nominal Height 11 11/16 in, Nominal Width 18 3/16 in, Filters Down To 0.3 micron, Filters Out Dander, Dust, Chemicals, Mold, Odors, Particles, Pollen, Smoke, Filter Efficiency 99.97 Percent