High quality version of 13H9513, INA branded. Dual use bearing fits the end of the A Plus 18mm mainshaft where the 1st Motion shaft slides on, plus it is used on the A Plus layshaft smaller end. Knowm as the 18mm bearing it was Rovers upgrade on using larger mainshafts and laygears with 3 step layshaft. CHM141 still fits the larger end of 4 Synchro layshafts.