Air Care Filter Compatible Grainger Part Number 4NHG1 Compatible Manufacturer Model Number 527300 5D6700 527800 MA0500 Actual Depth 1 in Actual Height 7 1/4 in Actual Width 7 1/2 in Media Material 7 Percent Polyester 93 Percent Polystyrene Filter Layer Type Carbon Electrostatic Filter Type Carbon Manufacturer Warranty Length 30 Day Limited Number of Layers 2