I'm not sure I want to sell this one, it was my 1st GonG piece, but on we go. There are a few tiny air holes in the sides of the tube, which force the air flowing through the tube to spin in a tornado like fashion. I'm not sure if the ripples in the shape of the tube aid in that function, or if they are just for aesthetics, but it sits well in the hand. It has an unconventional 14mm female joint, which is basically just a ground ring. the downstem makes a fine airtight seal in there, but is kinda wobbly. I broke the original downstem, and couldn't find one short enough when looking online, so the included downstem is a 14-14mm EHLE downstem, which I dremmelled down to size, then blowtorched the tip so it wasn't sharp. As I'm not really sure I want to sell, I don't have an asking price, but I'm open to offers Please note that all offers will be considered to be in $AUD (that's Australian Dollars). More pics are available on request Here's the pic: EDIT: Oh, BTW, this piece has a carb hole just under the downstem Mod note: If you're selling, state an asking price. If trading, state what you're looking to trade for. Bidding is not allowed. Ad closed.