【Good Quality】-- This Pulley Chain Roller is made from the high quality materials, sturdy and durable for long time service
【Suitable Fitment】-- The inner diameter of chain tensioner: 8mm, also can be used in gasoline electric bike conversion kit
【Strong Function】-- This gas chain rollers has a specially designed swing arm; the chain then goes over it to maintain alignment
【Convenient Use】-- The chain roller wheel complete with heavy duty bearings very easy to use
【Warm Prompt】-- This chain roller slider tensioner has an inner diameter of 8mm, please check the size and make sure this sprocket fits your needs
