The Aerotank Turbo by KangerTech is a beast! Built for durability, the body is made of stainless steel with a pyrex glass inner tank. With its 6ml. capacity and quad coils (comprised of two dual coil heads), it is perfect for large mod users. The Turbo is a very large and beautiful device. It also features an improved air control valve over previous Aerotank models. The tank also allows for adjustment of battery connector, and the drip tip is changeable.