Features1Compatible Models: The 104BCD sprocket adapter has 2 sets, which are specially used for Bafang and for Tongsheng mid motors, providing you more options. 2Accurate Cutting: The mid motor adapter adopts aluminum alloy numerical control cutting, which can fit your bike well and ensure the accuracy and performance. 3Practical: This sprocket adapter can be used with a variety of mountain bike accessories, and can be combined with a variety of configuration options. 4Durable: The mid motor chainring adapter is made of aluminum alloy. The hardness is much higher than that of the original steel sprocket, which is firm and durable. 5Easy to Install: The motor bike gear adapter is small in size, simple in structure, easy to install and disassemble, and can directly replace the original or damaged adapter.SpecificationItem Type:SprocketadapterMaterial: Aluminium alloyWeight: Approx. 405g/14.3ozBCD: 104MMApplicability: ForBafang, for TongshengmidmotorsPackage List1 xSprocketAdapter forBafang1 xSprocketAdapter forTongsheng