Ratchet starter for brushcutter, chainsaw, blower, hedge trimmer compatible with STIHL Outer diameter (mm): 65 Inner diameter (mm): 10.6 for models: STIHL BR 350, BR 430, FS 360, FS 420, FS 500, FS 550, SR 320, SR 340, SR 400, SR 420, SR 430, SR 450, BR 320, BR 340, BR 400, BR 420, BR 500, BR 550, BR 600, FS 160, FS 180, FS 220, FS 280 Original part No.: