1.BVC bottom single heating wire has equal amount of vapor production as BDC, but more pure taste and more advanced technology
2.It is well matched with currently mainstream BVC nebulizer on the market, with stable performance
3.BVC holds the same appearance as BDC and a double heating wire comes into a single heating wire. BVC employs a more advanced aviation technology to enables single heating wire with the same amount as double heating wire. http://www.aspirenautilus.com/5pcs-aspire-nautilus-bvc-coil-unit.html