ITEM NAME:Exhaust Muffler Kit Bolt Gasket fit for Stihl MS290 MS390 MS310 029 039 Chainsaw Exhaust Muffler Bolt Gasket Screw Fit for Stihl MS290 MS390 310 029 039 Chainsaw SPECIFICATIONS.Compatible with: Fit for Stihl MS290 MS390 310 029 039 Chainsaw. 1 x Muffler. 3 x Washer. 2 x Gasket.