For use in a system that uses clover clamp fittings, such as the B3-Pro series of brewery grade equipment. This utilizes our .5 micron stainless steel diffusion stone connected to a stainless steel tube that is welded onto a clover clamp fitting. A custom part that we manufacture. 6" from the clover clamp to the end of the carb stone.
If you're looking at this item, you likely looked for it specifically. It's a tube through a tri-clamp connector with an O2 stone on the end of it. I've had mine a couple of years now and it works very well for what it is. The issue I had is that after about a year of use the O2 stone separated from the tube. Looking at it, it appeared that it was just held on with some kind of epoxy/glue (JB Weld maybe??). I cleaned up the pieces and used some superglue and that held for about another year. I superglued it again. For the price of it, I would have expected something that was more securely attached (soldered/welded).