18mg Nicotine

18mg is about as strong as freebase e-liquid gets, and it is not a subtle experience. The throat hit is pronounced, which for a lot of ex-smokers is the point - it is the closest thing vaping does to a cigarette drag.

Use it only in a tight mouth-to-lung device with a high-resistance coil. Anything sub-ohm would be undrinkable at this strength.

Worth knowing: a 20mg nic salt is stronger and far smoother. Most people who used to buy 18mg freebase have moved across, and the ones who have not usually prefer the hit.