Carbon Prefilter, Filter Type , Performance Rating MERV 17, Actual Depth 3 7/16 in, Actual Height 17 1/16 in, Actual Width 5 7/16 in, Compatible Grainger Part Number 2HPC3, Compatible Manufacturer Model Number 2HPC3, Number of Filters 1, Media Material Coconut Shell, Filter Layer Type Carbon, Nominal Depth 16 7/8 In., Nominal Height 3 5/8 In., Nominal Width 5 1/4 In., Filters Down To 0.3 micron