These e-liquids are manufactured with 50% propylene glycol and 50% vegetable glycerine base. These are suited to most tank types and are the chosen base for the more prominent manufacturers as they are more like a one-size-fits-all mix. If you vape with a smaller device or pod system, you would be better off looking at the 40vg 60pg range, or if you love cloud chasing with a sub-ohm device, look at the higher VG-based e-liquids. Among the choices in this range are 10ml nicotine salt-based e-liquids; these bring a high-strength hit delivered smoothly with no harshness.