Roller bearing for crankshaft piston measures 15.8 x 12.1 x 12.7 chainsaw cut-off saw DOLMAR Models: 309 , 309 HappyStart , 343 , 343 HappyStart , PC-6212 , PC-6214 PC-6412 , PC-6414 , PC-7312 , PC-7314 , PC-7412 , PC-7414 , PC-8116 PC-8216 , PS-6000i , PS-6400 , PS-6800i , PS-7300 , PS-7310 , PS-7900 , PS-7910 Code: 40271630 Original Code: 962210121 - 962210019 - 962210015 MP