Adopts FM COILTECH5.0/Double-D Mesh Coil Tech to achieve a 50% improvement on the flavors and heating speed. It is ISO 8317 Child Resistant Certified to prevent the accidental opening by children. Fireluke 4 Tank also features φ28 diameter, 5ml e-juice capacity and easy top filling system. With the detachable structure, it is convenient to use and clean. Fireluke 4 Tank is compatible with Twister 2 80W Kit and Freemax X/TX/904L X Mesh Coil.