150 mg, 250mg, 500mg THC | O.pen CO2 Cannabis Oil Cartridges Sativa. Pen battery is sold separately. The O.penVAPE is the most convenient way to smoke ever! O.penVAPE provides exclusive strain specific cartridges in a high quality CO2 extracted honey hash oil. A brand new atomizer is built into every cartridge to create optimal taste and continuous functionality. No button, switches, or levers, you just puff and “it just works.” O.penVAPE is so invested in this revolutionary product, each pen and cartridge comes with a lifetime warranty.