- Compatibility: Fits plastic bottles with external teeth of 5 mm or 19.5 mm. The 14.5 mm external teeth can be used directly without fittings, broadening applicability for sealing tasks. - Silicone material: Made from durable silicone for repeated use. Sturdy construction helps prevent leaks or breakage during application. - Wide range of nozzle options: Includes a complete assortment of flat nozzles for different sealing projects. Suitable for both small gaps and larger joints, enabling precise and efficient application. - Fit and installation: Inner wire diameter of 4 mm ensures a secure fit on sealing tubes. Attach the flat nozzle to the tube and start sealing with ease. - Use scenarios: 1) Weatherproofing windows and door frames by applying sealant into narrow gaps. 2) Precision sealing in cabinetry, electronics enclosures, or furniture assembly. 3) Small-scale automotive or plumbing touch-ups that require a narrow, controlled bead.