The GRAV® Hammer Bubbler is 4″ tall and made on 32mm tubing. The body of the bubbler is clear while the mouthpiece, downstem, and feet are of colored glass. Its downstem diffuses smoke through a small amount of water, and its feet stabilize the bubbler between uses. Easy to use and no accessories are necessary for using this bubbler. It functions best with approximately 0.5″ of water.
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