Shimano Blue Shimano SP41 blue derailleur bowden cover / m

Cover for derailleur bowden. 4 mm diameter. Lubricated internally along its length with low-friction silicon grease to reduce cable friction. Special construction process makes for an axially stiff casing that transmits shifting movements accurately and quickly. Lined with a polymer sheath to assist with the smooth operation of the inner wire. For use with 1.2 mm diameter inner wires.