19MM Female Sherlock.
Sometimes referred to as a J hook.
This j-hook is thicker and stronger than the average j-hook you will stumble across. A very good good for the price.
I like J-hooks with a variety of vapes. I tend to go through them, seem to last about a year before I drop it.
I've owned several. I like this one and will probably by again in a year or so.
Glass is a nice thickness. It widens a little just below the frosted 18mm piece. Fun to watch vapor dance around in that spot. When I use it with a Tera, the angle of the jhook gives me a meerschaum pipe feeling. Fun!