250ml PG and VG is to mix together to your preferred ratio, 65/35 VG/PG (50/50 after ading the nicotin and flavour) or 85/15 VG/PG (70/30 after adding the nicotine and flavour)
100ml 50/50 VG/PG and 100ml 70/30 VG/PG are mixed and ready, you only need to add the nicotine and flavour.
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