Clutch sprocket needle cage roller bearing 10x13x10. Part number 9512 003 2260, 9512 933 2260
New aftermarket part
Fits many stihl models including: 017, 018, MS170, MS180, 021, 023, 025, MS210, MS230, MS250, 024, 026, MS260, 029, 039, MS310, MS390, MS290, 034, 036, MS360, MS261 and others.