The Stihl 42371200618 is a genuine OEM carburettor designed for optimal fuel delivery and engine performance in various Stihl power tools. This essential component ensures reliable starting and smooth operation for models including FS120, FS200, FS250, FS300, FS350 trimmers and brushcutters, as well as BT120C, BT121, and SP200 machines. With a robust construction, this carburettor measures approximately 95 mm in length, 51 mm in width, and 70 mm in height, weighing around 0.2 kg, making it a precise fit for specified applications.