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Description: *Brand New High Quality *Made of tremendous supplies for sturdiness and lengthy existence *Suitable for many electrical bikes *Standard 5/8/12 magnetic booster *Easy to install, smooth to use, and safe *Let you save extra effort ,ease and power when riding *Extend the battery life and improve the vehicle&;s range The utility model avoids the wear and tear to the battery attributable to high recent discharge Specification: *Material: Alloy *Color: As photographs shown *Size: Line Length About one hundred ten cm *Plug: SM-3A (1 Blue Signal, 2 Red Positive, 3 Yellow Negative) *Weight: about 46g/47g/50g Package Includes: 1 x Pulse assist sensor Note: 1 The real colour of the article may be barely varied from the pictures shown on website caused by many points akin to brightness of your visual display unit and light brightness 2 Please enable slight manual size deviation for the info