Total Dose is a low dead space needle.
Compared to standard detachable needles, using this type of needle reduces the risk of viral transmission and the loss of active product.

Total Dose fits well on most Luer syringes but isn't compatible with the Terumo 1ml, 2.5ml, or 5ml syringes, BD 1ml, or 2.5ml syringes and syringes that have a dead space reducing spike on the plunger such as the BBraun 1ml Injekt syringe.