RTA's and RDA's are both types of RBA. The RTA (Rebuildable Tank Atomizer) is a tank system and the RDA (Rebuildable Drip Atomizer) is a dripper system. With rebuildables, you "build" your own coil.

RDA/RTA

Smok X-Baby Rba
Smok X-Baby Rba
$12.99
    Compatible with– Smok TVF8 X-BabyFeatures– Includes a pair of clapton coils 0.35 ohm.
    Smok X-Baby Rba
    Smok X-Baby Rba
    $12.99