This is the Shimano Road Brake PTFE Coated Inner Wire – 2050mm. PTFE coated stainless steel inner brake cable for the ultimate in smooth braking performance, designed to complement the top-of-the-range Shimano Dura-Ace brakeset. Stainless steel PTFE coated precision ground round inner wires offer smooth low friction braking action with increased service life due to its anti-corrosion nature. Suitable for front or rear brakes, just cut to fit. Use with SLR brake cable outer.