The GRAV 4" hammer bubbler is a handheld glass bubbler that is easy to use and comfortable to hold. It is made on 32mm tubing and has a fission downstem that diffuses smoke through the water for smooth hits. It rests easily on a flat surface thanks to the small glass feet, and functions best with about 0.5" of water in it. It's made of clear glass and has a classic hammer bubbler shape. The GRAV 4" hammer bubbler comes in a 10ct.
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