My focalecig 18350 (ehpro style) vela is a stunning 23 mm beauty w/ a smooth switch. May be polished SS under the beautiful mirror gold plating. It hits hard but I haven't done a volt drop test. The mirror SS body is breath taking perfect. Makes UD polished toppers look unfinished. I would prefer a 21 mm 18500; maybe one day. The switch has reasonable slop unlike some other clones. The engraving is as good as my best hcicar nemesis. Clones are not created equal.
Focalecig has a 3 tube set of 21mm Caravela's