This is the full length speedometer cable that goes from the driver's side front wheel to the speedometer of a VW Bus. It will work with all Bus from 68-79. On the 75-79 Bus they originally had an OXY light that was activated by travelling so many miles. This required a small box with a lower and upper speedometer cable. This new cable by passes this box and gives you a one piece cable that will work your speedometer but will no longer turn the OXY light on. Since the OXY light is just an idiot light and not really needed for anything, why not bypass it.