Vivi nova tank v1, v2, v2.5 v3. (which is better)

[kurtcobain13]

which is better among the four tank? and whats the difference in each other?

 

[darthkir]

V3 has a slightly restricted air flow, its a bit tight when drawing mainly due to the cone that covers the coil is much longer towards the tip... but this solves the problem where vapour seeps into the tank