Furnace Air Cleaner Filter Filter Type Pleated Performance Rating MERV 8 Actual Depth 4 3/8 in Actual Height 15 3/4 in Actual Width 19 3/4 in Compatible Grainger Part Number 33R191 Compatible Manufacturer Model Number F100B1000 F100B1008 F100B101008 F100F1004 F100F2028 F150E1000 F200E1003 F25F1075 F35F1032 Number of Filters 2 Media Material Synthetic Filter Layer Type Electrostatic Nominal Depth 5 in Nominal Height 16 in Nominal Width 20 in Filters Down To 0.3 micron