Pretty big, four-hole, open-end stem, and the carb is on the front bubble. Hits like a dream and I love it, couldn't be happier. 30 bucks at the local headshop. Here's a pic of it with a cashed bowl.
Looks like my first bubbler . They are pretty nice, but I definitely prefer a pipe or a bong to the bubbler.
I didn't find it too harsh at all. Didn't cough on it, or feel the urge to. Me and two other people had no problem powerhitting it and passing it around quickly...Really made me fall in love with the thing, haha.