Features1Accuracy Cutting: CNC cutting of aluminum alloy is adopted to ensure the accuracy of product use. Better improve the performance of bike or mid drive motor. 2Applicable Model: The aluminum alloy 104BCD conversion base set is ly compatible for Bafang and for Tongsheng mid drive motor. match. 3High Hardness: The 104BCD chainring conversion set is made of aluminum alloy, the hardness is much higher than that of the original steel chain wheel, and it is sturdy and durable. 4Applications: The 104BCD conversion base can be used with a variety of mountain bike accessories and can be combined with a variety of configuration options for multiple routes, city traffic. 5Easy to Install: The chainring adapter has a lightweight, which is easy to carry and easy to install. At the same time it is durable and has a long lasting life.SpecificationItem Type: 104BCD 46TMidDriveMotorAdapterMaterial: Aluminum AlloyBCD: Approx. 104mm/4.1inWeight: Approx. 396g / 14.0ozPackage List1 x Mid Drive Motor Adapter Plate for Bafang1 x Mid Drive Motor Adapter Plate for Tongsheng