brand new and high quality Features: High quality of materials, wear and corrosion resistance, high hardness and lightweight. Installation: Support Single Speed/2 Speed/3 Speed/6 Speed Internal And External Transmission Can Be Used. Guide Wheel Bearings are Replaced With Stainless Steel Materials. There Is No Fear Of Rusting Under The Influence Of Weather, Which Increases The Service Life. for Play The Function Of Adjusting Rear Speed During Riding. The Horizontal Center Bearing Reduces Wear And Tear, And At The Same for Time Increases The Tension Of The Chain, Making It Difficult To Drop. Bicycle Chain Guide Wheel Kit only, other accessories demo in the picture is not included! Specifications: Material: Aluminum Alloy + Stainless Steel Diameter: app.4cm/1.57in 01 Wheel Height: app.2.18cm/0.86in 02 Wheel Height: app.2.55cm/1.00in Optional Color: Black, Golden, Red, Silver Quantity: 1 Set Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 Set x Bicycle Chain Guide Wheel Kit