Aspire's challenge to the sub ohming world comes in the form (or rather the shape) of their new Sub Ohm coils Sub Ohm coils , for use with a range of Aspire tanks. You'll notice that this is an attempt to mimic the impressive performance of RDA's in a tank. The coils have a resistance level of 0.5 ohms. Major improvements The new BVC (Bottom Vertical Coil) are a better version of the BDC (Bottom Dual Coil) replacement coils. The new coil models have new wicks which embrace the latest technology resulting into a sweeter flavor. Compatibility may be an issue but the user manual which comes along with the kit should make things clearer. Product features Aspire BVC coils come in a package with 5 units. They have a 0.5 Ohm resistance which works best within the 20 to 30 watt power range. This is the best gift you can buy yourself this year; no brand comes close to Aspire's revolutionary coils.