Jagwire 5mm Pro Compressionless Brake Housing with Slick-Lube Liner 10M Roll Kevlar reinforced housing resists flex to improve power, especially on bikes that require full length cable housing Slick-Lube lined housing reduces friction for snappier cable movement Housing Diameter: 5 Defined Color: Black Pro Compressionless brake housing eliminates flex from cable actuated braking systems, increasing power and improving lever feel.