ThaMa222 Double Automatic Syringe with 2 Different Dosages Unique fix dosages technology Fixed Dosages technology: Different piston for every measure (0.1cc, 0.2cc, 0.25cc, 0.3cc, and 0.5cc for each syringe, total 10 pistons); 2 different dosages, 2 different vaccines in one shot!!! The ThaMa 222 double syringe - is the solution for mass injections; Very light and handy; Save your Time & Money.