Radzierblende: What should you pay attention to?

Hello together, I hope someone can help me. Google doesn’t spit out anything right… And that’s what I’m looking for for bike trims for my car (yes, I think they look better than just steel rims). The prices are somewhere between 20 and 60€. Now I wonder what they can differ in? Is there an extra charge? What should be taken care of? Is there a recommended brand? Thank you in advance!