V9 is ceramic cartridge,2.0ml delta 8 cbd cartridge, big oil capacity, big filling space for easy to filling,100% No Leackage,it is fit for delta 8 cbd cartridge,For thick oil, we also use 1.6mm*4 oil intake hole size. If your oil is very thicker or thinner,we can customized oil intake hole size for your oil. Fit for CBD oil, THC oil, Delta 8 oil, Delta 9 oil and so on.The mouth tip of cartridge is made by ceramic,it is very clean and high grade. Connected 510thread battery.