Rear derailleur / Rear mech hanger.
CNC machined.
30% more resistant than a traditional hanger.
For a Bianchi/DB/Jamis/Kona/Raleigh/KHS frame (look at the photo).
Made In USA.
Axle : 9 mm
Brand Compatibility : KONA, BIANCHI, JAMIS
Mount type : 1 Bolt