Window Underlayment, Includes Not Applicable, Product Type Window Underlayment, Compatible with Grainger Part Number 15E777, 58LZ86, Overall Dia. Not Applicable, Overall Length 17 in, Overall Width 13 1/2 in, Weight Capacity Not Applicable, Compatible with Manufacturer Model Number 40389, 42389, Material Polystyrene, Overall Height 13 1/2 in