![just noticed this o-ring on my coil after taking it out. other coils don't have it. is it part of my uforce T2 tank or was this coil just different than others? : just noticed this o-ring on my coil after taking it out. other coils don't have it. is it part of my uforce T2 tank or was this coil just different than others? :](https://external-preview.redd.it/9RXNO5ZXWFvdz0k0GrZ1w7-2SacXyB5-yc9ptLOkes4.jpg?width=640&crop=smart&auto=webp&s=20d5f9dbcabea9428fff62bab64716b8312e2270)
just noticed this o-ring on my coil after taking it out. other coils don't have it. is it part of my uforce T2 tank or was this coil just different than others? :
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Ecig Silicone O Ring Bag Colorful Rubber Seal Rings Replacement Orings Set For Smoktech TFV12 Prince TFV8 X Big Baby Vape Pen
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