These are for:
Aspire ViVi Nova-S BDC Glass
Aspire ViVi Nova BDC
Aspire Mini ViVi Nova-S BDC Glass
Aspire Mini ViVi Nova BDC
Aspire ET / ET-S / ET-S Glass BDC
Aspire CE5 / CE5-S BDC
AnyVape Davide BDC
AnyVape Mini Davide BDC
You have a choice of 1.6Ω / 1.8Ω / 2.1Ω
It's recommended by Aspire to use the 1.6Ω coils if you are using a standard non variable voltage battery. If you are using variable voltage battery then you can use the 1.8Ω if you prefer more throat hit or 1.8Ω if you prefer a smoother vape.
To change coil you need to turn clearomiser upside down, unscrew the base, unscrew the coil head, then just screw in the new one and continue vaping. The Aspire coils have been known to last around 2 weeks or sometimes more, just change when you start loosing flavour.