General description Compatible with Stihl brushcutters FS120, FS200, FS250, FS300, FS350, FS400, FS450, FS480, BT120, BT121, and BT130. This air filter spark plug set is designed to replace the original equipment (OE) number 4134 141 0300. Scope of delivery 1 air filter 1 fuel filter 1 spark plug 1 primer pump