Frost King Storm Door Bottom Insert is a durable door bottom seal designed to replace worn weatherseal under aluminum storm doors. This Y-shaped insert measures 0.50 inches wide by 0.50 inches high and 37 inches long, providing a fit for your storm door. Made from high-quality gray vinyl, it reliable protection against drafts and weather elements, helping to maintain energy efficiency and comfort in your home. The insert comes packaged in a convenient bag and is ready to install without the need for adjustments. Model Number: Y3750