Chrome cap
Just an experience,
I purchased them from W&N some 2 years ago, and they were crap.
The parts showed parallel lines in the chrome, about 4-5 mm apart, that were traces of the milling of the steel tooling used to injection mould the plastic.
I returned then to W&N, they send another set without question, but still the parts loooked thesame. In words of W&N this was an original BMW part, no reproduction.
I reinstalled my scratched originals....
If you find new ones, please report back if they look OK to you.
Erik.