Dual Bulb Design:The dual bubble structure creates an efficient sealing layer, offering superior thermal insulation compared to single-fin seals. The concealed design hides the seal within the door, delivering effective insulation while ensuring smooth door operation Outstanding Features:The door bottom seal provides superior sealing to effectively block air, dust, and noise. It helps maintain stable indoor temperatures, reducing energy consumption and saving costs. Create a quieter, cleaner, and more energy-efficient sustainable home environment. Compatible Size:Each weatherstripping measures 36 inches long and 1.75 inches wide, capable of filling gaps up to 1/2 inch at the bottom of doors. Its dimensions fit most standard rebated door frames, providing a reliable protective solution for most entry doors and interior doors. Installation Instructions:Our double bubble replacement strips are easy to install, sliding effortlessly into the bottom groove of your door panel. To adjust the length, trim to the desired size using household heavy-duty scissors, a utility knife, or a saw. Weather Strip:You will receive 2 black double-bubble door bottom seals, crafted from high-quality vinyl material. These seals deliver outstanding performance and resist cracking or damage during daily use, making them the ideal solution for replacing or repairing door bottom seals.