SEALING RING FOR STIHL CHAINSAW DRIVE SHAFT MODELS: BG 45 , BG 46 , BG 55 , BG 56 , BG 65 , BG 66 BG 85 , BG 86 , BR 45 C , BR 200 , BT 45 , FC 55 FS 38 , FS 40 , FS 45 , FS 50 , FS 55 , FS 56 FS 70 , HL 45 , HS 45 , HT 56 CE , KM 55 , KM 56 MM 55 , SH 55 , SH 56 , SH 85 , SH 86 , SR 200 MEASUREMENTS: OUTER DIAMETER: 22 mm INTERNAL DIAMETER: 12 mm WIDTH: 7 mm Part No.: 40271862 Original part No.: 9639 003 1230 MP