The XO range of e-liquids are produced in the UK using only pharmaceutical grade nicotine, propylene glycol and glycerine. Available in a wide range of flavours, our XO 50/50 e-liquids can be used in sub ohm tanks, vape starter pens and pod kits. The XO e-liquids are also available in a range of nicotine strengths from 3mg to 18mg.