Functional ball bearing - easy to assemble

This is a 608 ball bearing, which carries 4.5mm balls.
It comes in three parts: the Outer, and the Inner, which is divided into two parts for easier and faster assembly.
Simply place part 1 of the Inner inside the Outer, place a few 4.5mm balls to fit, and fit part 2 of the Inner, and that's it!
If you want, you can add some glue in the joint for added safety and resistance, and grease or lubricant in the bearings to reduce friction and make them work better.
That's all for now, all suggestions and constructive criticism are welcome!