Note this listing is for the glass lightbulb (special edition!) filled with Nitrogen ONLY! A Glass globe filled with low-pressure Gases, N2 Nitrogen for this one, other variations (regular globes) including Helium, Neon, Xenon, Argon, and Krypton are available in separate listings. We have recently added CO2 as well. We also have a salt version (Xenon+Lithium or Xenon + Strontium).  

!!Please Note!! N2 globe CANNOT form a toroid/ring. Our quality standard for shipping N2 globes is that it is able to light up, not forming a toroid. Unlike Neon globes, you might get lucky and see a toroid by a very tiny chance; N2 cannot form a ring/toroid at all. 

The diameter of the Glass Ball is 80-82mm. 

The price includes ONLY a noble glass ball of your choice, there is NO power supply and NO additional device other than the ball. This is meant to replace the ball provided in other sets for different colors, or for people who enjoy DIY the power supply themselves. If you cannot recreate and make the drive circuit yourself, you will not be able to achieve the same effects, and we recommend you buy our whole set instead of the ball only. Additional globes are recommended for returning customers looking for different color/experiences with other elements. 

Seems like there are people reselling our products. As you can tell from the watermark, we made these products ourselves.