DERAILLEUR Hanger WHMFG#266 CNC machined 6061 aluminum GT Hanger #ATIDH0233 or K33047 Black anodized finish Attaches to frame with (2) M3x8 Flat head screws , Fasteners not included COMPATIBILITY :GT:Helion Alloy QR (Standard Mount) - 2016,Pantera (Standard Mount) - 2017,Sensor Alloy QR (Standard Mount) - 2016,Zaskar LE (Standard Mount) - 2016