19mm Female to 19mm Female Glass Adapter by Grav
A perfect, low-profile female to female adapter. It is a Grav product so you know you are getting a well-made, durable piece of glass. The thickness of this feels like it would do more damage to your floors than the actual adapter if your dropped it. Why waste money on some random piece from amazon that is inferior, when you can get the quality backed by Grav.
this is is the nicest 19mm female to feamale adapter I've ever seen. The glass is thick. It feels like a shot glass in your hand. This is a big step up from the ones I was buying on Am@zon.