The RBAs and the atomizers must be screwed into this adapter. But there are two types of these: the Smoant Pasito II Base, and the Smoant Pasito II Adapter, but both adapters fit into the pod head (Pasito II, Pasito III, Knight 80). Basically, the adapter is included with every device.
Smoant Knight 80 Pasito Adapter
Smoant Pasito II-III adapter
