Air Scrubber Filter, Filter Type , Performance Rating MERV 17, Actual Depth 2 1/2 in, Actual Height 16 1/4 in, Actual Width 18 1/2 in, Compatible Grainger Part Number 56GX66, 56GY10, 56GY11, Compatible Manufacturer Model Number BD-AS-550, Number of Filters 2, Media Material Fabric, Fiberglass, Nominal Depth 2 in, Nominal Height 17 in, Nominal Width 19 in, Filters Down To 0.3 micron, Filters Out Asbestos, Mold, Filter Efficiency 99.97 Percent, Includes Frame Yes, Package Quantity 2