The SMOK X4 Core is compatible with Vape pen 22, Vape Pen tank and Vape Pen Plus. The X4 Replacement Coils utilizes the new Vape Pen Coil System that features an elongated design, catering specifically for the Vape Pen Starter Kit. It is equipped with quad wicking ports to ensure rapid and consistent wicking, while utilizing 3mm NiCr heating element for auxiliary performance. 

0.4ohm X4 Quad Core - rated for 20W-50W
3mm NiCr Heating Material
Four Wicking Ports
100% Organic Cotton

NB: Each sold separately, per coil NOT per box.