Compatibility: This bicycle tail hook is compatible with GT Avalanche(2006-2016), Karakoram(2011-2013), Marathon(2007-2010), Zum Series(2006-2007), etc.
Model: 57A.
Material: Made of aluminum alloy, sturdy and durable, suitable for long-term use.
Function: Used to replace or upgrade your bicycle tail derailleur hook, protect your bicycle from damage when dropped.
Package: Includes 1x bicycle tail hook, 1x screw.