Our Co2 Clear glass cartridges are made of metal, ceramic, and high quality glass. The cartridge has a wickless feature, which allows a non burnt taste when pulling vapor. The oil in the cartridge ranges from 75-80% THC and is distilled twice in our lab, giving our customer a great and flavorful hit every time! The cartridge uses a universal 510 thread making it compatible with almost every battery in the vape industry. Our glass cartridges come in both half gram and full gram.