General Description This carburetor is designed for Stihl FS38, FS45, FS46, and FS55 2-mix series trimmers, offering perfect compatibility with model 4140 120 0623. Thanks to advanced fuel mixing technology, it precisely controls the fuel-air ratio, ensuring efficient fuel combustion. Technical Specifications Compatible with Stihl FS38, FS45, FS46, FS55 Compatible model: 4140 120 0623 Advanced fuel mixing technology Made from high-quality materials Compatibility and Accessories Ideal for Stihl 2-mix series trimmers No additional accessories required for installation Installation Installing this carburetor is simple and intuitive, facilitating maintenance and operation of the trimmer. Usage After installation, the performance of Stihl FS38, FS45, FS46, and FS55 trimmers will be significantly improved in terms of starting speed, cutting efficiency, and operational stability, allowing users to easily perform a variety of trimming tasks.