The Flyte/Keyy/Bob Pen Cartridge?? Our state of the art distillate vaporizer. The Flyte/Keyy/Bob Pen Cartridges?are the result of years spent exploring multiple forms of cannabis oil and vaporizer tanks and Dab Pens. NOTICE: These vape pens do NOT contain Vitamin E Acetate. ATTENTION: Prime your cartridge! Take 5 long pulls without the battery. This will avoid any burnt or distorted taste.? WARNING: Bob cartridges contain .6g of distillate in a .5ml cartridge We have successfully developed a proprietary technique to distill cannabis oil that removes ALL impurities and co-developed a pen vaporizer design that quickly vaporizes the thickest and most purified oil. This is not a pen for puffing. It?s a pen for the long haul. ?