The all new Smok TFV4 is quite the amazing sub-ohm tank, as it delivers some of the best performance abilities the vaping market has ever witnessed. Though the TFV4 itself has many great features, its replacement coils do the majority of the leg work, which makes it capable of offering an extreme flavor and vapor production. If you're looking to keep the TFV4 Tank continuously performing and want to experience everything it has to offer, you'll be amazed with the Smok TFV4 Big Family, which is a sampler of 12 cores! With the TFV4 Big Family by Smok, you'll receive 1 of each coil made for the TFV4, which includes a total of 9 coils and 3 RBA's. If you thought you knew your tank, just wait until you experience this ultimate TFV4 overload!