Features:
[QUALITY ALUMINUM ALLOY]: The bike rear derailleur is made of quality aluminum alloy with CNC machining, sturdy and firm, and -resistant.
[LENGTHEN THE REAR DIAL CHAIN]: The bike rear derailleur is used to lengthen the rear dial chain, and apply to mountain flywheel 0T/ 42T/ 46T/ 50T highway flywheel.
[SPEED CHANGE SMOOTHLY]: The bike rear derailleur makes the flywheel speed change more smoothly.
[EASY TO INSTALL]: The bike rear derailleur is easy to install and remove.
[GREAT ACCESSORY]: The bike rear derailleur is a great accessory for cycling enthusiasts.

Specifications:
Material: Aluminum Alloy
Optional Color: Red, Black, Blue
Total Length: Approx. 62 mm/ 2.44 inch
Height: Approx. 23.5 mm/ 0.93 inch
Thickness: Approx. 11.6 mm/ 0.46 inch
Hole Distance: Approx. 40 mm/ 1.57 inch
Weight: Approx. 31 g (Included screw)

Packing List:
1 * Bike Rear Derailleur Hanger
1 * Screw