BiteXtra will deliver where it counts and is available in four new strengths which are expressed as the percentage of Nicotine in the liquid. Most eliquids merely show a figure in mg, such as 24mg, without explaining that 24mg (properly expressed as 24mg/ml) is 24 milligrams of Nicotine per millilitre of liquid, or as we would prefer to express it, 2.4% Nicotine.