510 Blank CE4+ tank clearomizer is rebuildable CE4, the vapor coil can be replaced to make the clearomizer new again. Empty ready to fill with your favorite e-liquid. 2.5-2.7 ohms. Due to the wicking system these work best with PG e-liquid or a 60/40 mix of PG/VG. Will not work on a standart EGO battery, must be a EGO T, C or above.