Wheels Manufacturing Derailleur Hanger 266The Wheels Manufacturing Derailleur Hanger 266 is made from CNC machined 6061 aluminum and has a black anodized finish. Comes with two M3x8 Flat Head screws. GT Hanger# ATIDH0233 or K33047. Compatible with 2016 GT Helion Alloy QR, 2016 GT Sensor Alloy QR, or 2016 Limited Edition Zaskar.811079022431