Carbon Filter, Filter Type , Performance Rating MERV 17, Actual Depth 1 5/16 in, Actual Height 17 13/16 in, Actual Width 13 3/8 in, Compatible Grainger Part Number 2HPB1, Compatible Manufacturer Model Number 2HPB1, Number of Filters 1, Media Material Coconut Shell, Filter Layer Type Carbon, Nominal Depth 17 7/8 In., Nominal Height 1 1/2 In., Nominal Width 13 7/16 In., Filters Down To 0.3 micron