We had an overwhelming number of requests from our fellow vapers and so we made it happen. We bring you the Billow v2 Nano RTA! All of the features are identical to the Billow v2 RTA except its shorter and holds 3.2ml of e-liquid. The glass section still tapers out measuring 23mm in diameter and the base and the top cap of the Billow v2 Nano RTA are still 22mm in diameter allowing it to still sit flush on all of your 22mm mods!