RBA or Rebuildable Atomizer is a set of coils build by the user, a deck connected to the coils with the help of screws and cotton plugged into the coils. To vape the user drip drops of e-liquid to wick ( moistened withe E-Liquid) the cotton and vape. After few puffs the cotton dries up and the user has to drip e-liquid again to vape. RBAs are for advanced users who are confident with building their own coils/atomizers