I made these fittings for myself and later sold several sets. The aluminum tube fittings and bodies were constructed of seperate parts and pressed together with Loctite. It was too labor intensive for a commercial venture so I spent some time makeing some tooling for turning them out of a single block but never finished that project. I was attempting to make some with a spherical shape with a little more style than the more common ones that others sell like these brass ones I did here:

Updated on ... December 23, 2006