Window Underlayment, Includes (50) 12x24 Window Underlays, Product Type Window Underlayment, Compatible with Grainger Part Number 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 40403, 40403L, 40411, 40411L, 40413, 40413L, Material Plastic, Overall Height 24 in, Package Quantity 50