Double Door Weatherstrip Insert Type Brush Insert Material Nylon Insert Color Gray Insert Size 3/8 in Flange Material Aluminum Flange Color Silver Flange Finish Mill Flange Height 1/4 in Flange Width 3/4 in Flange Thickness 1/4 in Overall Length 8 ft Overall Width 1 1/8 in Stays Flexible to -40 Degrees F Projection 3/8 in Mounting Type Surface Max Door Gap 1/2 in Fire Rated 3 hr For Use With Wood and Hollow Metal Pair of Doors Hardware Included