Guts, I can't remember for sure (it was a long time ago I got mine), but I think the UFS when bought new came with both the clear and steel windows
The measurement of Ekowool is the inside diameter.
2mm is almost too wide. I don't think 3mm will work well at all.
small center post top nutView attachment 240688
Perhaps you could post a pic of what you did get and someone can figure out the mystery.Whatever I got looks nothing like this
How would this be?
Ekowool SCN 1 5 Solid Threaded Silica Core Atomizer Wick | eBay
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It seems like I read that it doesn't wick well. But I have tried Twik by the same seller and it works good. I'm still not sure how it holds up to a dry burn though since it's filled with cotton Twik Ekowool and Twisted Organic Cotton Yarn Hybrid Wick for Atomizer Build | eBay
I have the 1.5mm ekowool in mine right now. Also found the thinner silica sleeves worked great as well. Think it's the xs 116 at kidney puncher. Not sure what the difference is between the hollow ekowool and the "silica sleeves". Look the same to me.
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