Replaces OEM Stihl part 4002 710 2108. 25-2 Head. Stihl FS55, FS55R, FS56, FS56RCE, FS70, FS80, FS80R, FS90, FS100RX, FS110, FS110RX, FS130, FS130R, FS240, FS240R, FS250, FS250R, FR106, FR108. You can also look up parts by calling the manufacture of the product or looking for their support section on their website.
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