"Принесіть два, будь ласка."

Translation: Bring two, please.

[MatthewOrlowski]

When should one use дві instead of два? Is it only directly before a feminine noun? Or also when a feminine noun is implied? That is, if the person here is asking for 2 of something fem, then would it be Принесіть дві, будь ласка?

[skstudio]

The later is true. If the person were asking about something feminine, then it would be "дві." "Два" implies something masculine/neuter.

[sagitta145]

Дві, два and двох are accepted now, which are all the possible Accusative forms.