They are universal exchangeable & detachable bottom coil heads: can fit with eGo H2 clearomizer,  protank, mini protank, protank-2 glassomizers, Kanger EVOD, and other BCCs (Bottom Coil Cartomizer). If a protank glassomizer/H2 clearomizer does not work well, you do not need to throw away the whole clearomizer(glass cartomizer), just replace a coil head, the eGo clearomizer will work like a new one. Save Money!
The coil of our protank/H2 coil head adopts high quality Nickel-chromium wire, can produce big vapor, no leak, no burnt smell.

Characteristics:

Resistance: 3.0 Ohms(Normal resistance), 2.0 Ohms (Low reistance)
Diameter: 8.5mm
Length: 22.3mm
Weight: 2.8g

How to change the eGo H2 bottom coil head on eGo H2 clear cartomizer:

Step 1:Unscrew the eGo H2 clear tube from eGo H2 bottom base .

Step 2: Unscrew the old eGo bottom coil head from the top of the eGo H2 base assembly.

Step3: Screw the new eGo bottom coil head into the H2 bottom base again;

* Tips: A loose coil head can cause leaking.

Step4: Screw the eGo H2 clear tube back into the eGo H2 bottom base.