18" Chain fits Stihl Chainsaw 029 039 MS290 MS390 MS310 028 026 MS260 .325 74DL 325 pitch 63 Gauge Read the note customer will be responsible for return cost for this reason Carlton Unbranded K3 Fits some 18" Not all 18" are the same there is 3/8 pitch and .325 pitch For professional and trained users only ( READ IMPORTANT ) note even though your model is listed it could have 3/8 Pitch and this wont fit so it's the customers responsibility to verify fit need help email us the 2 digit number from your old chains drivers