Premixes are not ready to use. It is necessary to dilute it with a base. We suggest below the dosage of a diluted liquid: For 40 ml bottles: 0mg/ml add 20 ml nicotine free base, 1mg/ml - add 20 ml nicotine base 3mg/ml, 2mg/ml - add 20 ml nicotine base 6mg/ml, 4mg/ml - add 20 ml nicotine base 12mg/ml, 6mg/ml - add 20 ml nicotine base 18mg/ml. ----------------------------------------------------- Proportions of premixes VG/PG: 50/50