HIPA Clutch Drum Sprocket Cover with Bearing Cage for STIHL 029 034 036 039 MS290 MS310 MS360 MS390 034 Super Chainsaw Replacement manufacturer part number: 1125 640 2000, 1125 640 2004 Crank Diameter: 10 mm, Drum I.D: 2.985 Pitch: 3/8 Fitment models: 029 034 036 039 MS290 MS310 MS360 MS390 034 Super chainsaw Package include: 1pc sprocket drum cover, 1pc bearing cage