Doesn't look like carbon all the way through to me either. In fact if this is a well known company that makes reproduction parts I was in communication with them some years ago about this and they confirmed that they're mainly glass with a layer of carbon on either side. They assured me that it was impossible to make a U/C out of just carbon laminations, although I do have one I got from Westons that is carbon all the way through.
Does explain why their undercarts are so heavy!
Personally, I think it is highly cheeky to sell something as "carbon composite" when they really mean "glass composite with carbon wrap"