Soft and hard composite design for smooth operation - The seal uses a hard TPE in the sealing portion to resist deformation and degumming, and a soft TPE in the adhesive portion for flexibility in different environments. This enables quiet, effortless door/window opening and closing. Three-layer airtight sealing for better insulation - The three-layer seal blocks leaks, wind, noise and dust. The airtight construction provides effective sound insulation for improved comfort. Easy installation on narrow rails - The lower protrusion can be torn off, making it suitable for narrow rails. It can be installed with or without window shades. - Gap guidance: if the push-pull window seal gap is greater than 5 mm, no modifications are required. If smaller, the outside must be torn off for installation. - When using window visors, ensure the gap width is greater than 2.5 mm to avoid affecting push-pull function. Tear-off design to adjust thickness - Tear the lower part slightly to reduce thickness. After tearing, the push-pull window can be opened and closed freely without interference. Use scenarios - Retrofit noisy apartments or offices to reduce drafts, dust and outside noise while improving overall insulation. - Install on narrow-rail windows or doors where space is limited, with or without window shades, for a quick upgrade. - In vehicles or campers with window visors, maintain smooth push-pull operation while achieving effective sealing.