16 mm rba

Sweet Sixteen! The 16mm li’l brother of Estia / Aqua There are times when we desire going sleek. Thus mods like Gus-G16, GP-Piccolo, Ba-Gua, Chi-Sleek etc. exist, which carry 14xxx batteries in 16mm or 17mm tubes. And so there are RBAs like the Spheroid, Penelope, Aiolos Steam Machine etc...