These are authentic Aspire replacement coils for the BDC (Vivi Nova), ET-S, and K1 tanks from Aspire, and they are a bottom dual coil design. This is a five pack box. Heavy vapers should be changing these out bi-weekly, and the recreational user should change them every 3-4 weeks for optimal taste.
What's In The Box?
5 x Aspire BDC Replacement Coils