Furnace Air Cleaner Filter Filter Type Pleated Performance Rating MERV 13 Actual Depth 4 1/4 in Actual Height 20 in Actual Width 24 5/8 in Compatible Grainger Part Number 33R168 33R194 33R295 Compatible Manufacturer Model Number F100B1032 F100B1040 F100F1087 F100F1095 F100F2044 F100F2051 F200E1037 Number of Filters 2 Media Material Synthetic Filter Layer Type Electrostatic Nominal Depth 5 in Nominal Height 20 in Nominal Width 25 in Filters Down To 0.3 micron