Extra Long Weather Stripping - Total length is 40 feet, long enough to use for different size doors. Our kerf weather stripping spine is 5/32 inch, suitable for 1/8 inch groove and used for door gaps from 1/4 inch to 3/8 inch. Please measure groove size before purchasing. PVC Flange Design - Our kerf door seal features a rigid PVC flange, making it easy to install into door frames with grooves without worrying about falling off. Tear-resistant PE cover and high resilience PU foam ensure durability and flexibility. The material provides continuous rebound, conforms well to door frames, and remains pliable in both low and high temperatures. Easy to Install - No adhesive needed. Simply measure the gap, cut the weatherstrip to the desired length, and insert the white plastic flange into the slot or groove for a tight seal. Resists loosening or falling out. Multi-function - Ideal for replacing old or worn weather stripping. Helps block noise, light, rain, dirt, wind, leaves, snow, odors, and insects. Helps maintain indoor temperature by keeping homes warm in winter and cool in summer, potentially reducing energy costs. Enhances comfort and peace within the home. No Risk Purchase - All products are covered by a free replacement or full refund policy. If you have any questions or are unsatisfied, contact us and we will respond promptly.