I have read several comments about problems with the top caps and various forms of leaking on this V2. I thought I would point out for those considering buying who have not yet bought that I own 2 of the supposed copies (24mm) of the V2 from 2F vape. They are both perfect in every respect. They exhibit no leaking of any kind and the top caps seal perfectly. They may be clones but even if they are they are identical to the original in every possible way except one, the o-rings supplied are different than the original. I view that as a good thing considering all the negative reports about the o-rings. They have both looked and performed flawlessly. I have one silver and one black. The price is less than the original by a considerable amount. I am not in the habit of hawking clones, but these seem to perform better than the originals. Just a point of information. Also you can ignore the photos posted on 2F for these as they arrive exactly as the original.