This new and improved version 2.0 Gravitron® boasts a fivefold increase in glass thickness and upgraded platinum cured silicone grommet for a tighter seal. The 14 mm female ground joint now fits any 14mm male bowl and the flange at the top of the neck makes lifting the bottle a breeze.
This is the smaller version of the large Gravitron,
Designed by: Micah Evans
Joint: 14mm Female
Main material: Borosilicate
Use with: Flower