Features： 1、Suitable Model: Ideal replacement for the original old or damaged part, suitable for Bafang BBS01 BBS02 BBS03 BBSHD built in drive motor. 2、Aluminum Material: The electric bike cranks are made of sturdy and durable aluminum alloy material to ensure maximum strength and durability, so it can be used for a long time. 3、Mounting Method: The left pedal is reverse threaded so you can tighten it backwards (counterclockwise direction), not need too much time and energy cost. 4、Easy to Use: The driving side is normal and mounted in clockwise direction, clear about this can avoid inconvenience, providing a satisfying using experience. 5、Accurate Size: Manufactured with accurate shape and size, has a close fitting, simple for installation and removal, will not take much effort or time. Specification： Item Type: Electric Bike Crank Arm Material: Aluminum Alloy Color: As Picture Shown Application: for Bafang Built In Motor Gross Weight: Approx.457g/16.1oz Package List： 2 x Electric Bike Crank Arm 2 x Screw