Feature:1. Aluminum Alloy: Made of aluminum alloy material, which is much harder than the original steel chain wheel, strong and durable.2. Applicable Model: 104BCD conversion base is perfectly compatible for Bafang electric bike mid drive motor BBS01 BBS02.3. Aluminum Alloy CNC Cutting: 104 BCD bike chainring adopts aluminum alloy CNC cutting to ensure the accuracy of product use.4. Scope of Application: 104 BCD 32T bike chainring fits 7, 8, 9, 10, 11 speeds chainring, can effectively improve the performance of your bike.5. Good Workmanship: Exquisite workmanship, beautiful appearance, stable performance, providing you great using experience.Specification:Item Type: 104BCD Sprocket AdapterMaterial: Aluminum AlloyBCD: 104MMColor: RedWeight: Approx. 130g / 4.6ozApplication: Fits 7, 8, 9, 10, 11 Speeds.Package List:1 x 104BCD Sprocket Adapter