The SMOK TFV4 is the newest tank system to be released by SMOK. Unlike any other tank system to date the TFV4 uses two new patented sub-ohm coil head designs, a quadruple coil head and a unique triple coil head which houses each coil in its own separate tube. It also makes use of two separate styles of RTA head for single and dual coil for those who prefer to build their own coils. Its 5ml juice capacity is easily refilled by its convenient and leak free top filling port. The innovative double layered drip tip keeps your vape cooler than ever while its redesigned airflow system allows for maximum adjustability. The SMOK TFV4 innovative and unique design ensures it provides unrivaled taste and vapor production.