B.Food grade POM material mouthpiece, harder, high quality and good for health.
C.No use glue to connect glass tube, better for health, No glue flavor, purest taste.
D.High quality glass tube, show your standout oil.
E.Special quartz coil heat element design, provide purest tase.
F.Samll tank, big battery capacity, totaly use up oil, No any waste
G.1.3ohm lower resitance, 3.4v higher voltage, big hit
H.Sticker design arround the battery outside,Making your own disposable pen. Welcome OEM