How to Refill the E-Liquid

How to refill:

1. Unscrew the clearomizer from the coil head. Make sure to hold the Stigx vertical (with the battery end pointing upwards) to prevent spilling.
2. Fill the clearomizer with e-liquid. Make sure the liquid does not spill over the centre hole!
3. Screw the clearomizer back onto the coil head.

Which product do I need?
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