Injector bowl for use with a vape.  These come with a glass screen that you place a 1/2" metal screen on.  The glass screen makes it so the metal screen falls into the perfect spot every time.  

These can also be done with or without fume. 

These can be done as 18–18, 18–14, 14–18, or 14–14mm.

As shown is no glass screen, 14-18mm with small handle. This has been discontinued and now all have a glass screen for easy 1/2" metal screen loading and a small handle

All have handmade joints on top.