Carbon Filter, Filter Type , Performance Rating MERV 17, Actual Depth 1 15/16 in, Actual Height 5 7/16 in, Actual Width 3 3/4 in, Compatible Grainger Part Number 2HPD4, Compatible Manufacturer Model Number 2HPD4, Number of Filters 1, Media Material Coconut Shell, Filter Layer Type Carbon, Nominal Depth 2 1/16 In., Nominal Height 5 1/2 In., Nominal Width 3 13/16 In., Filters Down To 0.3 micron