Shimano Road Optislick Shift Cable Set – Black OPTISLICK: Polymer coating, Electrically coated, that when viewed under a microscope looks like a series of tubes wrapped around the cable Less surface area rubbing the internal housing liner and it holds grease longer Benefits are significantly less shifting effort and the feeling of a quicker shift action Set Includes: 1.2 mm x 2100mm OPTISLICK Cables (2 pcs.) OT-SP41 x 1700mm Housing SIS-SP40 outer caps (4 pcs.) SIS-SP40 sealed outer caps (1 pc.) OT-SP41 sealed outer cap for rear derailleur (1 pc.) Inner end caps (2 pcs.)