JAGWIRE SPORT DERAILLEUR HOUSING ROLLWith regular use, your cables and housing will wear out and will need to be replaced in order to ensure your bike's shifting remains optimal. With worn out housing, your shifting performance will take a significant dip. The Jagwire Sport Derailleur Housing Roll is a 25 foot roll of Jagwire derailleur housing. It features L3 with a continuous Teflon lubricated inner liner that provides incredibly smooth shifting and it includes the end caps. Features Linear construction Lead-free PVCL3 = Continuous Teflon lubricated inner liner Recommended for Shimano 10-speed shifting systems End caps included | Jagwire | Sport Derailleur Housing Roll | Black | 4Mm X 10 Meters With Lubed Liner