It just doesn't work that way...the only thing equivalent to a 1.25 FEV is a 1.25 FEV. Different atties have different structure and airflow path, though it may be "close enough", but the numbers say 1.8mm, which will probably be different enough to the kind of people that worry about such things!

Vape696969 wrote:

If i was a betting man, I'd bet SXK will deliver. With tobacco, i hear the FEV is great, as far as rtas go.

Word do matter Carrion - and the words you chose to use "but the numbers say 1.8mm " are very misleading as dual 0p.9 inserts will not flow as much air as a single 1.8. There are many vapers who prefer a fairly specific restriction for MTL - and they need the right information.

Nobody is quibbling about anything else you have written, just you deciding to correct Vape696969 about the effect of using two 0.9 airflow pins. It won't resemble anything like a single 1.8 and will be much tighter.

You have a Dvarw MTL I assume - before you kick off, stop and try dual pins out against a single airflow of twice the diameter - and you will find that Vape696969 was right on the money with his claim that two 0.9 pins will have a similar restriction to a single 1.25.

I prefer a fairly loose MTL and bought some dual airflow inserts and assumed that dual 0.8 would equal a single 1.6, and it was as tight AF for my preferences - the dual 1.2 seemed similar to a single 1.5, but anything smaller than that is too tight for me.

I'm not trying to take the piss Carrion as it's an easy mistake to make - and I've done it myself.

0.9 and 0.9 will equal 1.8 if you are measuring LENGTH, but in this case you are measuring the volume of air that will flow through two 0.9 inlets compared to a single 1.8. The two aren't the same thing.

I have made this assumption myself and got it very wrong. Before you kick off TRY IT.

I can't be arsed to argue with you, perhaps someone can explain the math to you to help you understand.