Drop in coil and or blister pack coil and or just coil is confusing.
A coil is a coiled piece of wire nothing more. A coil does not come pre wicked ready to mount & vape.
Almost every vape supplier sells pre made coils for rba use.
Could be a coil of any wire type or any standard to fancy coil type used in an RBA of some sort.
Replaceable atomizer head, used in delivery devices / clearomizers, tanks etc...
A single replaceable unit that is threaded or pushed into the base of a delivery device, a metal body containing coil(s) & wicking material with holes or slots in the body to allow liquid to absorb into the wicking material. Comes ready to prime, thread or push into base & vape.
RAH or head for short.
I cleaned up coils to a degree... but I'll like never stop calling RAH as drop in coils or factory coils... I've been calling them that for too long...