Fits STIHL 017, 018, 021, 023, 025, MS170, MS180, MS171, MS181, MS210, MS211, MS230, MS250

CLUTCH DRUM WITH SPUR SPROCKET

QUALITY AFTERMARKET REPLACEMENT

​O.E.M.# 1123 640 2003

L42221-20-38-525

6 tooth, 3/8" pitch

2-11/16" outside diameter

Please note: Some of these models use .325" sprocket. This only works with 3/8" bar and chain. Please verify before ordering.

 Ships Usually In 24 Hrs & To You 1 to 7 Days Canada & U.S.A.

NOTE: Overseas Orders Will Be Sent  By Way Of Ocean 4 to 6 Weeks 

Contact Us Before Purchase If You Would Like Air Service 10 Days.

Any saws shown are for display purpose only and are not included.