This 30207 bearing is a metric taper roller bearing. The bearing's dimensions are 35x72x18.25mm30207Tapered RollerLight Series35mm - Bore Size

This 30305 bearing is a metric taper roller bearing. The bearing's dimensions are 25x62x18.25mm30305Tapered RollerMedium Series25mm - Bore Size

This 30207A bearing is a metric taper roller bearing. The bearing's dimensions are 35x72x18.25mm30207ATapered RollerLight Series35mm - Bore SizeModel Code

This 30305A bearing is a metric taper roller bearing. The bearing's dimensions are 25x62x18.25mm30305ATapered RollerMedium Series25mm - Bore SizeModel Code