Replacement silicone mouthpiece for the G Pen Roam. *G Pen Roam Glass Tube not included. The G Pen Roam is an all-in-one portable vaporizer intuitively designed to provide water-filtered concentrate vaporization on-the-go. Featuring a spill-proof, self-contained borosilicate glass hydrotube, a fully Quartz tank, and powerful 1,300mAh lithium-ion battery, the G Pen Roam heats to temperature within seconds of activation to deliver smooth and flavorful draws with ease. -G Pen