1. Select a Bottle Size and input
or choose the Nicotine Strength.
2. Tap Calculate to see the recommended tubes.
3. Toggle Dark Mode for a different theme.
4. Freebase section supports custom mg input (3, 6, 12, etc.).
5. Salts section offers 25mg or 50mg only.
6. If you choose an extremely high nicotine level, a warning appears.
Certain strengths may be disallowed for safety.