Freebase is the more traditional form of E-Liquids, with nicotine that is closer to its purest form, thus having a higher pH. Freebase E-Liquids have a different proportion of VG to PG because of this, so instead of 50/50 like salts, they are 70/30. Seventy percent VG and 30 percent PG. This allows the smoke, when going directly to the lungs, to be completely enjoyable, even in large amounts. The nicotine levels for freebase E-Liquids come at 0mg, 3mg, 6mg, and 12 mg.