Coalescing Filter Element, Filter Type Coalescing, Particulate, Filter Rating 1 micron, Compatible Grainger Part Number 4HDT2, Compatible Manufacturer Part Number AO045HNFI, Filter Efficiency 99.925 Percent, For Fluid Type Compressed Air, Nitrogen Gas, For Substance Type Air; Nitrogen, Series OIL-X EVOLUTION Genuine, Standards All Editions of ISO 8573-1, ISO 12500-1