superjet magnum pump bearings

[xavix85]

hi.
i ordered koyo bearing 6205 c3 2rs and the balls collar is made of plastic and I'm afraid to install it with the new magnum pump because of that.
some one ever use bearing like this? i always see that the collar is made of metal

 

[badvinny]

Plastic cage is fine in a pump.

 

[JetManiac]

That does not look like a koyo bearing?