Artstation - 14 Skeleton Alphas Vol.2 (ZBrush, Substance, 2K)

https://www.artstation.com/marketplace/p/6Ymrq/14-skeleton-alphas-vol-2-zbrush-substance-2k

This pack contains 14 skeleton (skull and bones) 2048x2048 pixels Alpha maps (PSD) to add nanodetails to your cloths in Zbrush and Substance Painter.