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They are currently selling Wood on glass stems, with a pipe made of glass inserted in an 18mm bit of hardwood. The glass tube then comes out of the wood and is inserted into a silicon 'bowl'. The 'bowl' or stem where the herb goes for the UD is made of silicon, that's the only way I know of attaching anything to it.
I know at one point there was also a GonG solution -- I debated over ordering that before the WonG's came out. I think it's called the WPA and WPAGonG on the website. AFAIK the GonG just has a tapered glass end, otherwise they are the same piece. The stem in BDV's video and the pics on the website don't look like the same piece, I think Alan tapered off some glass tubing for the HI vid (but I have heard some stems are compatible with UD).
Even if you can't get that particular stem, there is always a way to rig an adapter. I forget the member, but a few pages back there was some photos of them changing a stock 14mm slide section into a water adapter but you'd probably still need limited silicone to make a nice seal.
Even if you can't get that particular stem, there is always a way to rig an adapter. I forget the member, but a few pages back there was some photos of them changing a stock 14mm slide section into a water adapter but you'd probably still need limited silicone to make a nice seal.
Edit: I'm looking around more I'm thinking this one may work best. Its made for pairing with silicone tubing so I'm guessing/hoping it would be pretty close to the same size as a typical glass stem.
http://www.ioffer.com/i/vaporizer-adapter-to-water-18-8mm-glass-on-glass-13-147932847
I saw that. Its a good idea but it still looks like the erb sits inside the silicone seal so its not really what I am looking for.
I was thinking about getting something like this...to my eyes it looks like it should work.
http://www.ioffer.com/i/12mm-to-18-8mm-straight-replacement-fitting-18-518242077
Edit: I'm looking around more I'm thinking this one may work best. Its made for pairing with silicone tubing so I'm guessing/hoping it would be pretty close to the same size as a typical glass stem.
http://www.ioffer.com/i/vaporizer-adapter-to-water-18-8mm-glass-on-glass-13-147932847
I use my UD's pretty frequently without the silicone tubing using Alan's 14mm all glass gong stems. There was also a glass nipple that some people were using. Pretty sure there was a video of it on here.
I will look and see it I can find it.