Zob Chamber Bubbler Dab Rig This bubbler from Zob Glass is one of the new designs they're rolling out for 2017. It's approx. 7.5 inches tall and is made of 5mm thick glass. The chamber on this bubbler is 75mm in diameter. Plenty of room for thick, milky rips. The bent design of the neck ensures a comfortable session that's splash-free. The fixed, diffused downstem adds excellent percolation to your smoke. This bubbler comes with a 14mm quartz banger. All Zobs are unique, so the label you receive will most likely be different than the label pictured.