All of our liquids are custom made at our facility in Hendersonville, NC. We spent months working with the chief chemist of one of the largest flavor extract manufactures in the U.S. Using our specs they designed custom extracts for us with safety and vaping in mind. The result was a very clean, crisp flavor that is sure to please the palate. We then mix just the right amount of extract with 30% PG and 70% VG. Finally we add 99.9% pure pharmaceutical grade nicotine to give you the desired strength. The nicotine used is of the highest quality and purity. What you end up with is an incredible tasting liquid with the perfect throat hit. You will be very pleased with the end result.