1Made of high quality aluminium material, which is lightweight and durable to use. 2Ergonomic shape utilizes the stampede acting efficiently to create more stampede traction. 3This is TSDZ2 intermediate drive motor chain adapter, you need your own compatible 104BCD chain. 4The positive tooth corresponding chain tooth is wide, tooth corresponding negative chain is narrow. 5Universal, after using it, it can be equipped with 36, 38, 44, 46, 48 or other specifications of the chainring.Features:1. Made of high quality aluminium material, which is lightweight and durable to use.2. Ergonomic shape utilizes the stampede acting efficiently to create more stampede traction.3. This is TSDZ2 intermediate drive motor chain adapter, you need your own compatible 104BCD chain.4. The positive tooth corresponding chain tooth is wide, tooth corresponding negative chain is narrow.5. Universal, after using it, it can be equipped with 36, 38, 44, 46, 48 or other specifications of the chainring.Specifications:Condition: 100% Brand NewMaterial: AluminiumColor: SilverBCD: 104mmSize: Approx. 8.5cm / 3.3inchWeight: Approx. 90gPackage List:1 x Bicycle Chainring