Good Day Farm 0.3g Disposable Metered Dose Inhaler (MDI) Pens are available in the same medicinally beneficial terpene profiles as GDF flower. They extract purely refined oil using the CO2 method, then de-wax and filter away the less desirable plant-based compounds like chlorophyll and cellulose. With CO2 extraction, the terpenes and cannabinoids native to the plant are kept together, resulting in a “full spectrum” oil.