VMX RN4081 Cartridges come in packs of five, each cartridge is equivalent to 7 to10 cigarettes and available in four different strengths; High, Medium, Low and None. High is equivalent to full flavor tobacco cigarettes, Medium is equivalent to light tobacco cigarettes and Low is equivalent to ultra light tobacco cigarettes. Our “None” cartridges contain no nicotine at all and are used to satisfy the mental addiction to tobacco cigarettes.