Freemax Fireluke 4 Tank. Rocking a max capacity of 5mL tank with replaceable 810 drip tip and a 510 base. Featuring a top filling system for ease of refilling your favorite E-Liquid. Fireluke 4 Tank is ISO 8317 Child Resistant Certified and adopts industry-leading FM COILTECH 5.0/Double-D Mesh coil technology to achieve a 50% improvement on the flavors and heating speed. Compatible with X1-D Mesh Coil series.