Clutch Assembly / Stihl 1123 160 2050Pack Size:1Stihl 1123 160 2050, Stihl 1123 160 2001Stihl 017, 018, 19 T, 021, 023, 025, MS170, MS180, MS190 T, MS191 T, MS210, MS230, MS231, MS241, MS250, MS251 chainsawsSize: 2 1/2 " OD