Window Underlayment, Includes (5) 12x24 Window Underlays, Product Type Window Underlayment, Compatible with Grainger Part Number 15E778, 448M07, 448M08, 448M09, 53RJ25, 53RJ26, 53RJ27, Overall Dia. Not Applicable, Overall Length 24 in, Overall Width 12 in, Weight Capacity Not Applicable, Compatible with Manufacturer Model Number 40390, 40403, 40403L, 40411, 40411L, 40413, 40413L, Material Polystyrene, Overall Height 12 in, Package Quantity 5