Joyetech BF SS316 Coil Head is desgined for ego aio series. Joyetech SS316 head has been applied to atomizer to go with not only Temp SS316 mode, VW mode, but also TCR mode where customer can set their own vaping preference thanks to the upgraded software of V3.01. Joyetech BF SS316-0.5ohm for lung inhale, Joyetech BF SS316-1.0ohm and Joyetech BF SS316-0.6ohm for mouth inhale. Joyetech BF SS316 head applies Bottom Feeding ejuice inlet which avoids the possiblity of leakage.