Hardware: Brake: Surly Seatpost Bolt Hanger Stainless
This cable hanger fits over a seat post clamp/binder bolt.
As Surly puts it, the thing is "long enough to eliminate kinked rear brake cables, large enough to fit over thick post clamp bolts, versatile enough to work with most other post clamps, and it’s even got an adjusting barrel. Stainless steel." 75mm in length.