This non genuine 18" guide bar fits Stihl models 024, 026, 029, MS240, MS260, MS270 and MS290 chainsaws. Please check the information on your old guide to ensure that is fitted with a .325 .063 74 drive link saw chain as these models are fitted with various lengths of guide bars and can be fitted with 3/8" saw chain, which will then require a different guide bar. Similar To Part Number: 3003 000 6817