Road gear cable set with steel inner wire,Complete road gear cable set designed using steel inner wires ,Fitting new gears or completely overhauling your gear cabling couldn\'t be easier - everything you need in one pack ,Includes 1.2 mm inner wires (2 x 2100 mm),and black 4 mm outer casing for a complete bike (1700 mm), and all end caps ,Steel inner wires ,Special construction process makes for an axially stiff outer casing that transmits shifting movements accurately and quickly ,Outer casing is lined with a polymer sheath to assist with the smooth operation of the inner wire.