M-D Building Products 25740 M-D Ultra High Dome All Purpose Top Threshold, 36 in L X 1 in W X 4 in H, Aluminum, Satin Nickel Fits doors up to 36-Inch wide Seals gap up to 1-Inch high between door and threshold U.L. Rated All season protection against drafts, moisture, dust and insects Satin Nickel finish