brand new and high quality Features: Made of high-quality materials, durable, high strength, anodized treatment, no fading. Using full ceramic non-resistance bearing, friction power consumption is reduced, and lubrication is unimpeded. The frame is made of high-strength and lightweight carbon fiber material, which is safe and stable. 17 teeth big guide wheel, stable and fast speed change Precision screws fix the guide wheel, no looseness, safe riding. SD2 Compatible For: Shimano-R6800 6700 6770 6870 9000 9070 SD3 Compatible For: Shimano-R7000 SD4 Compatible For: Shimano-R8000, 8050, 8070, 9100, 9150, 9170 Bicycle carbon fiber ceramic rear derailleur guide wheel Set only,other accessories demo in the picture is not included. Specification: Material: Carbon fiber + aluminum alloy + ceramic Size: app.16x9x8cm/6.30x3.54x3.15in Optional Color: Black, Red Optional Style: SD2, SD3, SD4 Quantity: 1 Set Note: 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 Contents: 1 Set x Bicycle carbon fiber ceramic rear derailleur guide wheel