G Pen (Grenco Science)
Leading personal vaporizer brand.
About G Pen (Grenco Science)
Grenco Science leads at the forefront of ingenuity and aptitude, consistently engineering the most advanced, user-friendly portable vaporizers in the world. The first to market a tank system specifically designed for personal aromatherapy regimens, Grenco Science™ integrates superior functionality with the convenience of transportability.
United States, Canada, Arizona, Nevada, Massachusetts, Alabama, Alaska, Arkansas, California, Colorado, Connecticut, Delaware