Description: Made of aluminum alloy. Helpful when the 10 speed, 11-speed flywheel upgrade to 42T - 50T. Workmanship is very detailed, smooth burr-free, precise size. With this tail hook extended artifact, no longer worry about climbing. At this time, you just need to add this product in the bicycle real dial hook the converter, you can easily solve the troubles you encounter. Specification: Material: Aluminum Alloy Size: Approx. 47.4 x 25.4 x 12.6cm / 18.66x 10 x 4.96inch Package Includes: 1 Piece Bicycle Rear Derailleur Hook Lengther 1 Piece Screw Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor
