The Joytech BF coils feature a bottom fed juice flow design with a vertical coil and organic cotton wick. 316 Stainless Steel wire is used in 2 of the coils allowing them to function in normal wattage and temperature control modes. There is also a higher resistance Clapton Available. This added flexibility allows the device to be used on a vast variety of mods with and without temperature control and gives you more options when dialing in the perfect vape for you.
Joyetech Atopack Penguin/SE/Dolphin Starter Kit Replacement Coils