Received this one today, and I'm extremely happy with it. Is short, it has almost maximum straight through bore for a 510 drip tip, fits quite nicely with a single O-ring and it doesn't get hot. Enjoying the smaller things in life, literally, at the moment.

This doesn't do jack when you receive it, so be prepared to do some modding. It's well worth it, in the end. First: they had the brilliant idea to paint the 510 connector, so there'e no negative connection. Well, at least not where it's supposed to be. After sanding down the 510 very carefully, the problem wasn't solved so I took the whole think apart. The plus pole insulator is a cheap plastic POS that's not the correct size, so it creates a dead short. I put a small o-ring underneath it and the problem was solved. Also don't forget to really tighten the deck after you've tightened the positive screw. Just grab the posts and twist till it won't budge anymore. Vapewise, this is a very nice atty. Perfect flavor and very easy to build on.

This one is a no-brainer. Just cart this and be happy, because you will have a tough job trying a 1000 lm flashlight for this price that performs this well. I'm thinking of buying one for all my friends and family this christmas.

Be aware that this thing has a steel front with some very ugly writing on it in Times New Roman. Sound quality is ok, but nothing to write home about. Whenever you turn this thing on a Chinese woman yells "The bluetooth device is ready to pair" and when you you connect she yells "The bluetooth device is a connected". Why they didn't choose for some simple beeps is completely beyond me and it gets very annoying very quickly. Gave this thing to the kid next door, he was very happy with it.

These are great value. ID is about 3.1mm and they are clean out of the little container.