This is glass bong attachment that can be used to vaporizer Cannabis & other essential oils. It has a SG 14 sure ground friction fit, a 60° bend and a lever operated metal pan, so works perfectly on any standard glass bong. In use, the metal pan is heated from underneath while oil or herbs are added to the pan. This produces a gentle evaporation process - similar to a vaporizer. Smokers that have a SG 19 glass bong can bridge the difference with an adapter.