Which Coils would the RPM40 RBA need?

So I have an RPM40 and wanted to get the RBA but was wondering what type of coils I would need? They look really thin and different from regular coils and I can’t find online which coils I should use. It says the resistance on the page but if I do buy the RPM40 RBA I don’t know which coils to get.
Can anyone help me?

SMOK RPM40 RBA Coil