Complete OPTISLICK gear cable set designed to suit 105 5800 and Tiagra 4700 gears Complete OPTISLICK gear cable set designed to suit 105 5800 and Tiagra 4700 gears Includes 1. 2 mm OPTISLICK inner wires (2 x 2100 mm), and SP41 outer casing for a complete bike (1 x 1700 mm), and all end caps OPTISLICK is electrically coated to the stainless steel inner wire leaves a smooth surface for low friction and reduced sliding resistance Outer casing is lubricated internally along its length with low-friction silicone grease to reduce cable friction SP 41 outer casing uses a special directional wound construction process makes for an axially stiff cable 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