Rear derailleur gear cable set with all you need in one handy pack. 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 1 x 2100 mm and black 4 mm SP41 outer casing for the rear derailleur 1 x 2000 mm 1x sealed outer caps with added tongue with rubber shields 5x plastic sealed caps plus inner end cap Stainless steel inner wire for corrosion resistance Outer casing is lubricated internally along its length with low-friction silicone grease to reduce cable friction 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