This ramp is used to build grades up to bridgesnThis ramp is the same length as 8500nThis ramp can be used with the 8978/8979 pillarsnMarklin Z GaugenHigh quality plastic constructionnThis ramp is used to build grades up to bridges. This ramp is the same length as 8500. This ramp can be used with the 8978/8979 pillars. Marklin Z Gauge. High quality plastic construction.