Bearing – Enduro Bearings 6003 LLB ABEC 3

11,73 

17x35x10 mm, used as a BB bearing for older square-taper BBs, and can also be used as a pivot bearing

Bearing – Enduro Bearings 6903 LLB ABEC 3

12,56 

17x30x7 mm used as a hub bearing, as bottom bracket bearing for some older square taper BBs