G Pen Elite Vaporizer by Grenco ScienceG Pen Elite Vaporizer by Grenco Science Overview Far lighter and smaller than its predecessors in the Grenco lineup comes the G Pen Elite Vaporizer by Grenco Science. Designed to vaporize dry herb, this portable vaporizer is the perfect pocket companion for when youre on the go or just relaxing at home. With a height of four and a half inches, a width of one and a half inches, a one inch diameter and a light weight of eighty eight grams this Vape Pen