HIPA Trimmer Head Cap with Spring Autocut 25-2 Cover for STIHL FS55 FS70 FS76 FS80 FS100 FS85 FS120 String Trimmer For STIHL Autocut 25-2 trimmer head 1 x trimmer head cover, 1 x spring Do not work on STIHL FS55R trimmer head