MR Series
MR series are micro series bearing with mm level bearing hole/bore. These include:
MR104 ZZ, MR105 ZZ, MR106 ZZ, MR115 ZZ, MR117 ZZ, MR126 ZZ, MR128 ZZ, MR137 ZZ, MR148 ZZ, MR52 ZZ, MR62 ZZ, MR63 ZZ, MR74 ZZ, MR83 ZZ, MR84 ZZ, MR85 ZZ, MR93 ZZ, MR95 ZZ