Orbea MX20/MX24 Rear Derailleur Hanger
This rear derailleur hanger is for MX20 (20 inch) and MX24 (24 inch) kids bikes
Please check yours against the pictures (unless it's completely mashed up - then it may not look quite the same!)
It includes the fastening two piece bolt
Orbea description: PATA CAMB.REC.CROSS+MTB