Product FeaturesIt features a typical sleeve-type friction accumulation, where the magnitude of the accumulation force is related to the load.The key bearing assembly, composed of precision ball bearings and plastic inner and outer sleeves, is not only aesthetically pleasing but, more importantly, enables the roller to operate more quietly.The design of the plastic end caps at the ends of the roller can prevent dust and splashing water from damaging the bearings to some extent.Steel sprockets are used as driving elements, making it more durable.Applicable temperature: -5℃ ~ +40℃.