I have Testosterone Enanthate by Sci-Tec LAB 250mg/ml contains 10mL
and i have these needles i got of my friend and they go by mL not by mg's so im kind of confused what to go by , either buy needles that go by mg's or go by mL's.
Dont understand exactly how much to take out from the sealed mixture, is mL accurate on these needles , so confused please help..!Click image for larger version. 

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