Orbea OIZ Rear Derailleur Hanger
This OIZ rear derailleur hanger installs on the OIZ 2015 bike with a small machined screw (tightened with an allen key)
Please check yours against the pictures (unless it's completely mashed up - then it may not look quite the same!)
It includes the fastening screw
As well as 15430152 - it is now called Y0000231