Grav Labs is one of the most well-known scientific glass brands in the industry founded in 2004 in Austin, Texas. They offer a large selection of high-quality dab rigs, bongs, bubblers, ashcatchers and much more! Grav Labs first claim to fame is their widely renowned gravitron gravity bong as well as their line of helix smoking products. All Grav Lab pieces are made using specialized thick, high-quality borosilicate scientific glass. We are proud to be an authorized retailer and offer a wide selection of Grav Lab pieces here at TokerSupply. Grav Labs is constantly innovating and evolving so check back regularly for the most recent designs from Grav Labs.