Circuit track with potential-free switching contact, with bedding. Length 115 mm (half standard length). ? Triggers a switching pulse while travelling with axles having a wheel flange height of 1.1 mm (ROCO standard). Using wheel flanges with a varying height can result in malfunctions. ? With fault clearance to avoid switching spikes. ? With bumper protection ? Can also be used as a response instantaneous contact along with a response module or detector 10808.