Nano Kit for 4.51 RTA

Not a simple nano kit, but a real 2.5ml additional tank.

Taking advantage of the Naked ring of the 4.51 kit and with the addition of the Tank Cap, we have an additional reserve that can be carried around, and why not, being a regeneration base, have the possibility to reduce the tools that a good vape must carry behind.

We also get a change in aromatic level given by the shorter chimney.