The STIHL 63387045400 Motor Housing is a genuine OEM replacement part designed for various STIHL cordless trimmers and KombiEngines. This essential component provides protection and structural support for the electric motor, ensuring optimal performance and durability. It is compatible with models such as the FSA 90, FSA 130, FSA 135, KMA 130 R, and KMA 135, maintaining the original equipment quality and fit.