Help Identify flange

This appears to be a flange coupling hub used to connect a rotating shaft to mechanical equipment. Flange couplings are commonly used to join shafts in motors and pumps and are secured with bolts to transmit torque

References:

https://www.sciencedirect.com/topics/engineering/coupling-hub

Reason:
thank you for the opinion, but I need more concrete information on what this unit it, and where its sold, what it fits, please use a reference link to the same item