Please be aware that nicotine is classified under several Schedules in the Poisons Act in this country. It is illegal to sell or supply without a license in Australia and as such has to be sourced overseas. There are various strengths to choose from when ordering from overseas websites. Vaper Cafe Australia DOES NOT RECOMMEND 'PURE' NICOTINE at a concentration of 99% (999-1000mg/ml). Mishandling of pure nicotine and high nicotine concentrations can lead to serious consequences, including death. Pure and high strength nicotine liquid (higher than 100mg/ml, or 10%) is also dangerous to postal workers, and others who come in contact with it while in transit, due to the chance of damage and spillage of the product. Nicotine is easily and quickly absorbed through the skin, poisoning can occur this way as well as through ingestion or inhalation. Be aware that it only takes a very small amount of liquid nicotine to kill a child or a pet. When working with nicotine it is important to have a good knowledge of the potential danger and correct safety practices. Please do some thorough research about safe handling practices, the consequences of spillages, incorrect nicotine mixing, and the symptoms of over dosing on nicotine before you purchase it. Handle with caution; -Wear gloves, and clean spills off your skin immediately. -Take extreme care to avoid splashing in your eyes. -Don’t mix or handle nicotine liquids around children. -Store all nicotine liquids in a secure, safe place out of reach of children and pets. -Make sure your calculations are correct when mixing doublers with high strength nicotine liquid. Nicotine for use by vapers can be referred to as Unflavoured Nicotine Base, Nicotine Liquid or Nicotine Juice, (or Pure Nicotine-which is extremely dangerous). Nicotine in liquid form for mixing or DIY comes in a variety of strengths, the usual and recommended ones are: -36mg/ml = 3.6% -48mg/ml = 4.8% -100mg/ml = 10% mg/ml means: milligrams per millilitre RECOMMENDED MAXIMUM NICOTINE STRENGTH FOR MIXING = 100mg/ml which is 10% Please do not discuss or mention nicotine at strengths higher than 100mg/ml on the open forum of Vaper Cafe Australia.