Blue Dream Full Spectrum Cartridge by Onli Flowers contains CO2 Oil which is a full body extraction of the cannabis plant that preserves the fullest range of cannabinoids, flavanoids and terpenes, ensuring you receive the complete benefits of the cannabis plant, as nature intended. These 510 thread cartridges ensure users a clean, tasty pull with a controlled airflow feature. All of Onli Flower’s cartridges contain no propylene glycol (PG) , vegetable glycerin (VG) or fractionated coconut oil (MCT).