I couldn't be completely sure what it is, but if it's open into the chamber of the pipe it's the carb.

And herbal smokes is what it says, herbal smokes. I can't tell you what is in it, but they're blends of different plants that will have different reaction. They're not meant to copy weed, just to be smoked in and enjoyed in their own way; they do though, cause a reaction (relaxation being one of them...I read this a long while ago so I don't really remember.)