This bike rear derailleur pulley jockey wheel is constructed of CNC 7075 aluminum alloy, lightweight and durable. It is a wonderful accessory for your bicycle.
Features：
Anodized CNC machined construction.
Ceramic bearings.
Fits for 4/5/6mm roller screw axis and most of rear derailleur on the market, support 7/8/9/10 speed.
Anti Rust/Corrosion Resistant Anodized.
Specification:
Product: Bicycle Rear Derailleur Pulley Jockey Wheel
Brand: Lixada
Material: 7075 aluminum alloy
Color: Black / Silver / Blue / Red / Golden (Optional)
Size: 11T / 13T (Optional)
Diameter: 41mm
Package Size: 7 * 4 * 1cm / 2.8 * 1.6 * 0.4in
Package Weight: 10g / 0.35oz
Package List:
1 * 11T Wheel