What's in the box:

Lixada MTB Road Bike Ceramic Pulley 7075 Aluminum Alloy Rear Derailleur 11T Guide Cycling Ceramics Bearing Jockey Wheel (red)

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