Propylene glycol and vegetable glycerin of PE (European Pharmacopoeia) quality. Natural and synthetic food flavourings of vapological quality. They contain no sugar or gum.
Ultra-pure water (Milli-Q).
Possibly pure liquid nicotine, manufactured in France by VDLV, PE quality, extracted from tobacco leaves. This is regularly analysed in purity and concentration using in-house analysis means (HPLC and gas chromatography /mass spectrometer), and compared with standards supplied by accredited laboratories.