Measurement: .325" Pitch, 7T, Mini 7 Spline, 17mm Inner Hole
For Stihl 026, 028, 028AV, 029, 039, 034, 036, MS260, MS260C, MS261, MS261C, MS270, MS270C, MS280, MS280C, MS290, MS310, MS390 Chainsaw
Replace For OEM No. 00006421240, 0000 642 1240
Replace For OREGON 34162X
Include: 1 x Chain Drive Sprocket Rim