Features 1、Applicable Model: Compatible with mountain bike 40 42 46 50 52T, etc., road bike 34 36 40 42T and other flywheel extensions. 2、Durable Material: Made of aluminum alloy material, CNC work, strong and durable, wear resistance and long service life. 3、Easy to Install and Remove: Easily replace and install the hanger for smoother tension and speed adjustments for easier riding. 4、Reasonable Design: Helps to improve the overall performance of the bike, and can directly replace the old parts for higher strength. 5、Quality Assurance: Strict quality control standards, good stability and excellent performance, high safety factor, can be used with peace of mind. Item Type: Bicycle Rear Derailleur Hanger Material: Aluminum Alloy Weight: Approx.13g/0.5oz Applicable: Compatible with Mountain Bike 40 42 46 50 52T, Etc., Road Bicycle 34 36 40 42T and Other Flywheel Extensions Package List 1 x Bicycle Rear Derailleur Hanger 1 x Screw