The Grav Mini Hammer Bubbler is a true workhorse. This compact bubbler pipe measures a travel-ready 3” inches tall by 5” inches long, and is made of thick glass on 25mm heavy wall tubing. The fixed flower bowl on top leads your smoke through the center of the main chamber where an x-cut diffuser downstem filters each hit through water. The fission downstem functions great with a minimal amount of water needed, and we recommend filling with about ½” an inch of water for optimal draw resistance. A built-in left side air carb gives you full control over clearing the smoke from inside the chamber, while the glass marble feet allow this bubbler to stand upright between hits. The body is made from clear borosilicate glass while the mouthpiece, downstem, and marble feet come in your choice of matching colored glass accents. Classy, functional, and affordable, the Grav Colored Mini Hammer Bubbler always gets the job done.