Seal Dustproof Insulation: the bottom sealing strip of the Larsen storm door is used on the inside of the door to provide an extra barrier against the elements. Compatibility: The storm door sweeps are compatible with the Larson & Pella storm door extender and are suitable for most storm, metal, and vinyl doors. Easy to install: Before installation, it is recommended that liquid soap be dripped into the door groove and the rubber strip slid into the existing door sweep groove. Durable: The Replacement Larson storm door sweep is made of high-quality rubber. It has a strong seal and wear resistance and is not easy to tear or warp, helping to reduce the penetration of dust and outdoor pollutants. Adjustable design: Replacement Pella storm door sweeps can be cut to the correct length based on your needs. Before cutting, install it at the bottom of the shroud for a more accurate length. (Note: Please ensure the profile shape matches your original part before placing an order.)