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SPECIFICATION: U channel: Aluminium alloy Rollers: Diameter 34mm (Black) Fitting: JY series connectors How to calculate the length of roller track The standard gradient is 6% (~3.5° ), so to measure a track in relation to its overall length, the calculation is follows: The length of the roller track equivalent to the overall length-65mm Margin: The maximum margin must be less than 5mm divided between the two ends. Online Add to Basket
