Stens 085-7177 Pro Spur Sprocket

Stens 085-7177 Pro Spur Sprocket Specs: 0.3937 crank diameter Replaces OEM Numbers: Carlton 5-100962X, GB ST305-R6N, Oregon Ref. 100961X, Ref No SST305-16N, Stihl 1123 640 2073, 1123 640 2003 Fits: Stihl 017, 018, 018C, 019 T, 021, 025, MS 170, MS 171, MS 180, MS 181, MS 190 T, MS 191 T, MS 210, MS 211 and MS 230