Our RBA Aliens are built for performance-carefully handcrafted to deliver bold flavor and smooth vapor in compact setups like RBAs (Boros) and single coil RTAs. The “X” means it’s a refined second version, often favored for its tweaks. “S” stands for single-coil setups-perfect for tighter builds and included as a pair.

For the full Disclaimer and Returns Policy, please check out section 13 of our Terms & Conditions.