Stihl Chainsaw Chain- 26RS68- 18 Inch, 68 Drive Links, .325 Pitch, .063 Gauge Only Fits Stihl Chainsaw Models 025, MS250, and MS251 Genuine Stihl Chainsaw Chain Please Check Your Stihl Bar to Verify Correct Chain 18 Inch, 68 Drive Links, .325 Pitch, .063 Gauge