These wicks are for your CE5 Rebuildable Clearomizer, once you’ve used your CE5 for a few weeks (users experience different lengths of usage) you will need to replace the coils. Replacement wicks are for your CE5 Rebuildable Clearomizer, once you’ve used your CE5 for a few weeks (users experience different lengths of usage) you will need to replace the coils. The tank is meant to be reused, but the coils are disposable once they