Compatibility: This product is compatible with TITAN TTL 688 Hedge Trimmer Full Ruixing. Product function: Prevent air leakage: Ensure a tight connection between the carburetor and the engine intake manifold to prevent air or mixture leakage and affect the air-fuel ratio. Maintain vacuum: The engine needs a stable vacuum environment to operate normally. Poor gasket sealing can cause vacuum leakage, causing problems such as unstable idle speed and power reduction. Prevent icing: In cold environments, direct metal contact may cause carburetor icing. Gaskets can reduce heat conduction and reduce the risk of icing. Easy to install: Direct replacement without adjustment, perfect compatibility and high reliability.