Non Genuine Replacement Chain Sprocket Washer and E-Clip for STIHL Chainsaws. Replaces Part Numbers: 1123 129 0900 & 1123 149 0500. Fits Models: STIHL MS 210, MS210 C, MS231, MS231 C, MS251, MS251 C, MS261, MS261 C, MS241 C, 029, 039, MS271, MS271 C, MS291, MS291 C, MS311, MS391, 019 T, MS191 T, MS240, MS171, 036, 018, MS270, MS270 C, MS280, MS280 C, 036 QS, MS230, MS230 C, MS260, MS260 C, 034, MS271, MS271 C, MS291, MS291 C, MS360 C, 024, MS170, MS170 C, MS180, MS180 C, MS360, 021, 023, 025, 017, 028, 026, MS340, MS190 T, MS181, MS181 C, MS290, MS310, MS390, MS250, MS250 C, Fits Models: MS241 C, MS261, MS261 C, MS231, MS231 C, MS251, MS251 C, 036 QS, MS211, MS211 C, MS361, MS361 C.
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