80/20 VG/PG 9MG nicotine shot.
These are used to top up any shortfill to the correct volume whilst adding nicotine.
9MG are used in place of 18mg to give a final nicotine strength of 1.5mg
50ml add 1 x 9mg for 1.5mg
100ml add 2 x 9mg for 1.5mg
150ml add 3 x 9mg for 1.5mg