HEPA Filter Filter Type HEPA Performance Rating MERV 17 Actual Depth 9/16 in Actual Height 10 7/16 in Actual Width 4 1/2 in Compatible Grainger Part Number 2HPE1 Compatible Manufacturer Model Number 2HPE1 Number of Filters 1 Nominal Depth 10 1/2 in Nominal Height 4 5/8 in Nominal Width 7/8 in Filters Down To 0.3 micron Filters Out Bacteria Viruses Filter Efficiency 99.97 Percent Frame Material Paper Includes Frame Yes Number of Layers 1