Why Nokon? They use a unique linked alumiunum housing that's compressionless, rust-proof, resistant to kinking, and significantly lighter than traditional housing. Complete, ready-to-install cables and housing for your front and rear derailleurs. You'll get 55.1" of linked housing and two stainless steel cables for the Campy-specific set, and 51.2" of linked housing and two stainless steel cables for the Shimano set. This system is hugely popular with Dura-Ace fans becuase the linked housing allows you to run your cables beneath your handlebar tape and eliminate the "antennae" look of traditional Shimano cables and housing. Your choice of Silver or Black cable housing.