only if it's an OEM one, if it's a refurbed 172 cup turini then it'll be 38.5.
If you've got the wheel it'll say on the inside what the ET is.
having said that your post just says 182 anthracite, in which case it may not even be a Turini - are you talking about the standard 182 wheel or a Trophy wheel? only the Trophy wheels were ET45.