Brand and Made of high-quality materials, durable Used to replace electric bike old part,for BBS01 BBS02 G340 series motors design for bafang MidDrive,Motor Controller easy to use and install,104BCD ,good compatibility The factory batches are different. If there are slight differences in appearance, it does not affect the product's applicability. Colour:black Material:Metal type:36T Package Contents: 1 x Bike Chainring Adapter Spider Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.