Features of C19 cbd cartridge:
1. Top adjustable airflow design
2. No hole on the bottom, 100% no leakage.
3. Special oil cup stucture, easy to fill by machine
4. 2.3mm oil inlet hole size, fit for thick oil.
5. Pyrex glass, no chemical reaction, high temperature resistant.
6. 1.6ohm double coil, big vapor
7. OEM/ODM logo/packaging/color/resistance/hole size according to your requirements.