The 7th glass is the TG-7, as in "Trilogy Glass" 7. This 15" tall percolator bong, equipped with an 18mm joint and a double chamber matrix perc. The TG-7 makes for a really smooth hitting bong or dab glass with double the diffusion. It comes with a bowl piece, but it can be easily converted to an oil rig.
Here are the features summed up:
- double chamber
- matrix perc
- 15" Tall
- 18mm joint
One of the best double percolator bongs out there, you can almost feel how smooth the TG 7 by looking at how well it functions in the video above. Prospective buyers should notice the size, the single stack of tiny bubbles in its functioning, and the style.
15 inches may not stand out to you as you read the description, but it sure will stand out as you clear it.