This glass bubbler attachment is made for the GRAV Glycerin Chiller Multi Kit. It’s an interchangeable part made of thick, durable borosilicate glass and equipped with a fixed slitted downstem and deep herb bowl. What it does is allows you to take things up a notch with your GRAV Chiller Kit by adding extra cooling and filtration to your smoke sessions. Pretty dope, huh? It’s decorated with an etched GRAV decal on the side that makes it even sexier when you take it with you to enjoy cool hits anywhere you go. A must-have for all GRAV Chiller owners!