Instant Ocean Alkalnity Test Kit

[Reefer07]

I was actually looking for a favor from someone if they new. I have the IO test kit that comes in the black box with alk. ammo. nitrate, nitrite and PH.
I lost the little test tube you use to fill the bigger one for the alkalinity test.
I was wondering if anyone knew or could find out the exact volume of that smaller test tube.

Thanks for any help,
Zac