Vivi nova replacement head confusion

[Kdizzle]

Hi guys I'm super confused about something when it comes to replacement heads for Vision vivi novas. Sometimes I see replacement heads on sale with a multiple wick setup, and sometimes I see replacement heads with just one wick.

What exactly is the difference here? Which replacement head should I be looking to buy?

 

[syeroc]

From what I have seen, and I could be wrong, is that the higher ohm heads only use a single thick strand of silica vs the lower ohm heads using a few thinner strands. Not sure what the reasoning behind that is. Unless they have to have a larger diameter coil to get the resistance up higher. Just my thoughts on it.

 

[thinkingaboutit]

You need to order impedence that matches your device. What device/mod will it be going on? Different wicks I have not seen on replacements. Mine are all double. Do the descriptions say what material the wick is?

 

[Cavediver]

If you're not talking about a single strand wick vs a multi strand wick, perhaps you're seeing single and dual coil replacement heads for the Vision Vivi Nova?
Vision Victory & Vivi Nova Tanks
A better picture of the dual coil model:
Dual Coils for the Vision Dual Coil ViVi Nova Tank

Assuming resistance values are the same, a single coil head takes less power to run than does a dual coil head; that's not a bad thing if you're using an eGo type battery.