This quality non genuine spark plug cap and spring is fitted to the Stihl BT120, BT121 Augers & FR350, FR450, FR480, FS120, FS200, FS250, FS300, FS350, FS400, FS450, FS480 Brushcutters.
Please check your old part with one shown in the picture to ensure this is the item you require.
Similar to Stihl Part No: 4128 405 1000 & 0000 997 0604