I shipped all the chrome orders at the same time when I received my caps back from the Chromer, there’s always the possibility of mixing up orders but I didn’t handle any polish orders while filling the orders that included yours so I’m pretty sure it’s chrome. As far as comparing it to the radiator cap, those were chromed years ago when I first made them, I used a different Chromer at that time so there could be a difference on how they look. I’ll check my leftover chrome inventory on these brake caps and see if I did mixup a polished one.