Gultnis – Enduro Bearings 6700 2RS ABEC 3

9,98 
10x15x4 mm, used as a hub bearing for some ultra lightweight hub designs, but more often is used as a pedal bearing

Gultnis – Enduro Bearings 6702 2RS ABEC 3

10,71 
15x21x4 mm, used as a freehub bearing for some lightweight hub designs, DT Swiss in particular

Gultnis – Enduro Bearings 6202 2RS ABEC 3

8,38 
15x35x11 mm, used as a hub bearing but has been used in e-bike motors and stationary trainers