Qiankun STIHL 029 039 MS290 MS310 MS390 REAR HANDLE HOUSING. NEW 1127 790 1001 To fit Stihl 029, 039, MS290, MS310 and MS390 chainsaws. A replacement for original part 1127 790 1001 A high quality non genuine part. Please note that the colour of this part may differ slightly to that of the original. Rear handle housing assembly.