The extra large Gravitron is 14" tall and 3.5" in diameter. The outer base is designed to hold 10" of water. As the inner bottle is pulled slowly upward, smoke from the 12mm bowl fills the chamber. Once the bowl is removed, the 16mm downstem doubles as a mouthpiece. Lowering the bottle back into the chamber forces smoke up through the downstem in a pressurized flow. The Gravitron is the first all-glass gravity smoking system and GRAV's namesake.
Designed by Grav Labs, in Austin Texas, this piece is made from high quality scientific glass.
Grav Labs is a US designer, manufacturer, and distributor of some amazing high quality scientific glass bongs, dab rigs, bubblers, hand pipes, and much much more. They were founded in 2004, in Austin, Texas and are known around the world for their quality pieces. Grav is easily one of the most respected names in the glass industry, and their product quality, design, and functionality are a clear indication as to why.