Flexible stainless steel braided brake line to suit most tri-axle:
Most brake callipers should come with a hydraulic union similar to this one shown, we do sell these if required. As a guide:
HU4: suits Trigg, Trojan, Alko & most other brake callipers.
HU5-M10: suits PBR Type 1 & Type 2 brake callipers.