some pulleys use bushings , and some use cartridge Sealed bearings


there is the self bushing using the plastic of the pulley as the bearing surface

as it rotates around a steel sleeve,

and there is an oil bronze bushing with a steel sleeve the plastic pulley is molded around.

good luck with Ebay if they are bling colored , and that is what you feel you need, fine.

as a spectator , rather than seeing the problem 1st hand , in the bike shop, I cannot say.


Metal pulleys are noisier than plastic ones , so dont complain if that is heard.

last dura ace top 'centron' pulley I saw was a bushing type
the index stuff needs the pulley to slop sideways a bit.
bushings make that practical ..