The RPM RBA Coil by SMOK is a rebuildable atomizer for use with the RPM40 starter kit and other vape kits compatible with the RPM series of coils. The single coil deck has 2 postless connections with top down Philips screws, and large wicking channels on each side. The RPM RBA supports coils with a minimum resistance of 0.25Ω, and the large central airflow channel makes the atomizer most suited for direct to lung vaping.