Complete top-of-the-range gear cable set designed to suit Dura-Ace 7900 and Ultegra 6700 gears Fitting new gears or completely overhauling your gear cabling couldnt be easier - everything you need in one pack Includes 1. 2 mm inner wires (2 x 2000 mm),and black 4 mm outer casing for a complete bike (2 x 600 mm, and 1 x 320 mm), and all end caps Die-extruded PTFE coated inner wire leaves a smooth surface for low friction in use, and stainless steel provides smooth shifting and higher 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. black 4 mm outer casing (2 x 600 mm, and 1 x 320 mm). all end caps. Die-extruded PTFE coated inner wire. stainless steel provides smooth shifting and higher corrosion resistance. Outer casing is lubricated internally along its length with low-friction silicone grease.