what to bring to a hair modeling casting call?

so i’ve gotten invited to my first closed casting call for a major hair care brand. i’m super excited but ive never been to a casting call. im a newbie with only a few paid shoots under my belt (ive only been doing it seriously for like 6 months but ive been having a good run.. after ppl on reddit told me i couldn’t do it lol)

anyways - what do i bring to a casting call? and can i show up any time during the call or do i have to show up at the start? what can i expect from a hair casting call?

TY in advance !!!