"1 to 2 ml" doesn't have a specific numerical value. It's a range, meaning it could be any amount between 1 milliliter and 2 milliliters.

To give you a better understanding, here are some examples:

* 1.2 ml falls within the range of 1 to 2 ml.

* 1.8 ml also falls within this range.

* 0.5 ml is *not* within this range, as it's less than 1 ml.

* 3 ml is *not* within this range, as it's more than 2 ml.