【Good Quality】-- This Pulley Chain Roller is made from the high quality materials, sturdy and durable for long time service
【Suitable Fitment】-- Inner diameter: 10mm, can also be used on gas petrol motorized bicycle conversions kits
【Strong Function】-- Specially designed with the swing arm; the chain then runs over it to keep it aligned
【Convenient Use】-- The chain roller wheel complete with heavy duty bearings very easy to use
【Warm Prompt】-- 10 mm Inner Diameter, Please check the size and confirm this chain roller meet your need
