Application:Fits STIHL FS90,FS110,FS130,HT101,HT130,HT131. Replace Stihl 4180 120 1800 **All the applications indicated in this posting are for reference only, the part for sale ONLY replace the relevant OEM numbers. If you are not 100% sure this is what you need, please find out engine model,series number, e-mail us to confirm before your purchase.