The long wick thread enables the e-liquid forward to the heating coil more smoothly, even when the e-liquid is less. So you can refill after the e-liquid after the e-liquid was use up, less deposit left in the CE4 clearomizer, make your clearomizer clean, and longer lifespane.
CE4 clearomizer
for more info, please visit: http://www.ecigator.net/cartridges-cartomizers/165.html