Our Astronaut beaker is elegant and durable. Made of borosilicate glass, this bongs 9mm thick tube sits on a 5" wide and 12mm thick base, making it a sturdy option for our smokers. Our Astronaut beaker is elegant and durable. Made of borosilicate glass, this bongs 9mm thick tube sits on a 5" wide and 12mm thick base, making it a sturdy option for our smokers. The Astronaut beaker is made with a decal that is bonded to the glass and will not be easily removed. The decal also features a decal window below the downstem joint so you can still know how clean your piece is with a full wrap. This bong comes equipped with a deep bowl that will give you a nice, even burn. Specifications: Thickness: 9mm Tube w/ 12mm Base Height: 16 in / 40.50 cm Joint Size: 19mm Female Tube Diameter: 50mm Downstem Length: 5.75 in / 14.5 cm Included: Bong With Colored Glass Downstem and Bowl