Roller bearing for crankshaft piston measures 12.8 x 10.2 x 14.3 chainsaw cut-off saw HUSQVARNA Models: 40 - 44 - 51 55 - 340 - 345 346 XP - 350 - 353 JONSERED: 2041 - 2045 - 2149 - 2055 Code: 40271631 Original Code: 501 451601 - 503 256301 MP