On my 18” RST wheels, are the center caps plastic or metal?

[Resqu2]

I have searched everywhere so I hope someone here knows. I’m taking my wheels to be powder coated and really need to know this cause if I have to buy black center caps then I’m going to have to have to guys match the color of whatever center cap I have to buy vs just dropping them off and having them done in satin black. Thanks much! 

Edited January 1, 2021 by Resqu2

[Mcropper514]

Plastic with a metal "cap" on the center part if that makes sense.  All the clips are plastic and it's like there is a thin metal dome over the exterior part you see in the wheel.  Hope that helps.