https://www.artstation.com/a/8914114
info about this Product :
50 Brushes & Alpha (4k Resolution )
Zbrush Brush (ZBP)
PSD (Alpha)
PNG (Alpha)
TIF (Alpha)
Help Text File (Txt)
PSD, PNG, PDF, TIF, ZBP, JPG ( preview ), Txt
https://www.artstation.com/a/8914114