ITEM NAME:Sprocket Clutch 3/8 Inch For Stihl 017 018 021 023 025 Ms170 Ms180 Ms210 Ms H1I3 Sprocket Clutch 3/8 Inch For Stihl 017 018 021 023 025 Ms170 Ms180 Ms210 Ms H1I3 Fits Stihl chainsaws:017 018 021 023 025 MS170 MS180 MS210 MS230 MS250 3/8 LP pitch spur sprocket replaces#:1123 640 2003,1123 640 2073 Color:silver material:metal Package Contents: 1x sprocket 1x clutch 1x sprocket bearing 1x E-clip 1x washer