1、Bearing Structure: Bike derailleur set, with beraing, Smooth rotation, firm tightness, avoid falling off at the joint, and protect body safety. 2、High Strength: Aluminum alloy material, integrated cutting and forming design, polished, the surface is smooth without burrs. 3、Lightweight Design: CNC precise machining, light weight, does not take up space, easy to carry, and can be placed anywhere. 4、Strong Compatibility: Derailleur is compatible with 2~3 speeds, and the chain pusher is extended to ensure strength and will not wear the guide wheel. 5、Surface Treatment: The surface is painted with anode, the color is bright and does not fade, and the aluminum alloy body is protected. Item Type: Bicycle Derailleur Set Material: Aluminum Alloy Weight: Approx.70g/2.5oz Compatible: 2-3 Speed 3 x Derailleur Assembly 2 x Derailleur Parts1 x Spring 2 x Gasket 2 x Screw