The XIV is a low profile dripper atomizer with a very reduced atomization chamber, BF compatible, very easy to use and build.
Full set of topcaps for the XIV RDA : Ø24mm SS + Ø22mm natural Ultem
+ Ø22mm black Ultem
Ø22mm black ultem topcap for the XIV RDA
Ø22mm ultem topcap for the XIV RDA