"What are the stages?"

Translation: Quali sono le fasi?

[carasheri]

I thought fasi is the plural of fase which is fem. except in plural it drops the e for i, but quale would remain fem plural?

[Viaggiatore]

Quale is never fem. plural. It's masc. or fem singular. The masc or fem plural is quali.

[f.formica]

Despite the -i, they're all feminine plural :) Most words ending in -e in the singular end in -i in the plural, and they're gender invariant, so it's "la quale fase", "le quali fasi".

[carasheri]

thank you to both for your help.