Air Filter, Filter Type Pleated, Performance Rating MERV 17, Actual Depth 5 3/4 in, Actual Height 24 in, Actual Width 24 in, Compatible Grainger Part Number 817G99, 819X51, 819X52, 819X53, Compatible Manufacturer Model Number OA2500 PLUS, OA2500 PLUS-A, OA2500 PRIME, OA2500 PRO, Number of Filters 1, Media Material Aluminum, Fiberglass, Nominal Depth 6 in, Nominal Height 24 in, Nominal Width 24 in, Filters Down To 0.3 micron