ITEM NAME:Muffler 11271400601 Gaskets Screws Bolts fit for Stihl MS290 MS390 310 029 039 Muffler Bolts Gaskets Screws Kit Fit for Stihl MS290 MS390 310 029 039 SPECIFICATIONS.(MPN: 1127-140-0601, 11271400601. Compatible With: fit for STIHL MS290 MS390 310 029 039 Chainsaw. (The Muffler Parts as the picture show). 2) Perfect match for the original one. Item included.