These inserts are designed to replace the positive connection on the base of your 0.5 ohm EUC coils and deliver precise airflow adjustment even if your setup does not allow for this eg: Boros & Bridges

Sizes included in this pack are:
1.0mm
1.5mm
2.0mm
2.5mm
3.0mm
3.5mm
Note: Please do not forget to swap this part over when you change coils 😉