I posted this in another thread but will repost it here. Since I am local, I went to the store and I purchased two of these. They are bigger and heavier but with a standard sized drip tip, it's only about 4mm (less than 1/4 inch) taller. I don't have my calibers but it can't be much more than 1 or 2mm larger at the widest point around the top ring. Where it mounts to the bottom cap, it's the same size. I have them on my X6's and they balance perfectly. I actually like the little extra weight and they are still pocket friendly with an ego style battery. They actually look like it was design specifically for the X6 (they weren't) because of the similar designs. The machining is beautifully done and the threading is what I would call buttery smooth. The drip tip snaps right into place solidly and the gapping at the bottom is perfect. Since its made from surgical stainless steel, no worries about vaping from it. The vaping is no different than the Pyrex tank, same clean taste. FYI, I went there intending to buy the smooth but ended up getting the grooved because I like the tactile feel so much. There is no leaking.
On a side note, they have evod replacement heads for a $1.00 that work perfectly with the Protank and tighten up the draw. $1.00!
Also I'd note, these aren't made in someone's garage. They are made by a machinist who specializes in this type of work.
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