The lower rollers with the spring did not fit my shower enclosure. They are a little lower than the rail, as a result of which they do not hold the glass on the lower side.
I put the ones without a spring on the bottom as well, and the problem was fixed. However, this means that 4 of the 8 rollers are useless.

In relation to their price, their quality is very good and their operation is satisfactory. Pay attention to the distances of the holes in the glass from the top and bottom edges. I had to file down the support pin a little because the previous rollers were very different. The adjustments for leveling are easy.

They seem to be of good quality although I don't know how long they will last. I managed to install only the top row which are their fixed ones.

The bottom row with the spring is not suitable for AXIS CX cabins...

Extremely good wheels at a very good price. I did the job myself without getting ripped off. They were asking for 20 euros just to install them...

At the same price, there are also some other ones in gray plastic color and one wheel. While these cabin wheels have double wheels, they have a silver cover in the color of the cabin and plastic stops. They are much better than the gray ones with one wheel.