Compatibility: This product is Compatible with ZAMA RB-151, Compatible with Oregon 49-913,Compatible with Stihl TS410 TS420 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. Product list: Product include a total of 1Set Carburetor Rebuild Kit , which can completely meet your daily use needs and replacement., Manufacturer: LT Easiyl