Brake cable (or bowden cable) for use with the following Knott braking systems. 160mm x 35mm 200mm x 50mm 203.2mm x 40mm 250mm x 40mm These are known in the trade as "detachable cables" as they can be fitted and removed easily without taking off the brake drum. The cable length refers to the black outer part of the cable not including the end fittings. The outer diameter of the cable cup or "bell" should measure 22mm.