Applicable models:For STIHL MS290 MS390 029 039 MS310 Part Number: 1129 640 2000 Tooth: 7 Pitch: 3/8"" Packing List: 1 x Drum Sprocket Clutch and 1 x Clutch and 1 x Bearing and 1 x Clutch Sprocket Collar and 1 x E-clip NoteIf you have any problems in the purchase process, you can contact me at any time, we are online 24 hours a day, you are welcome to enter the store for consultation Warm tip: please can rate our products after the have received, thank you for your support If you need to buy in bulk, you can contact me, I will give you an appropriate discount Applicable models:For STIHL MS290 MS390 029 039 MS310 Part Number: 1129 640 2000 Tooth: 7 Pitch: 3/8"" Packing List: 1 x Clutch Sprocket and 1 x clutch and 1 x bearing and 1 x clutch sprocket collar and 1 x e-clip Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store