Description: 【High Quality Material】: Thumb Throttle Speed Controller is made of high quality ABS material, high quality, flame retardant, strong and durable, wear resistant and non slip, easy to use. 【Easy to Install】: The Electric Scooter Thumb Throttle Accelerator provides stable and responsive speed control and works well on the handlebars. Easy to install. 【Size】: Electric Bike Thumb Throttle Control size 5.3cmx4.1cm/2.09inchx1.61inch, handle diameter 2.2cm/0.87inch, cord length approximately 168cm/66.14inch 【Durable】: Bike Thumb Throttle wires and interfaces are durable and have good contact, ensuring low failure rate after long term use. 【Widely Applicable】: Thumb Throttle Speed Control is suitable for most electric bicycle or scooter handlebars on the market. Specification: Material: ABS Line color definition: red: positive pole, green: signal line, black: negative pole Size Chart: 5.3cmx4.1cm/2.09inchx1.61inch Package Includes: 1x electric bike thumb throttle control Note: Please allow slightly errors due to manual measurement and different monitors.