Air Filter, Filter Type Pleated, Performance Rating MERV 17, Actual Depth 12 in, Actual Height 12 7/8 in, Actual Width 12 1/2 in, Compatible Grainger Part Number 814KH5, Compatible Manufacturer Model Number MA-14, Filter Layer Type Carbon, Filters Down To 0.1 micron, Filters Out Dust, Pollen, Smoke, Filter Efficiency 99.9 Percent, Standards CARB, UL Listed, Package Quantity 6