Price is for 1 Double Red Railroad Dwarf SignalsO Scale 1:48 or 1:43.5made of LEDs will come with resistors for 12V or 16V use Connect the resistor to the Common Anode ( Black Wire ) if you will use them on 12V or 16V Operating Voltage = 1.8V to 2.4VOperating Current = 18mA to 20mAwill come with resistors for 12V or 16V use Characteristic Price is for 1 units Size for each : check from the photos for O scale 1:48 to 1:43.5the signal head is made from Plastic Brand new PRODUCT DESCRIPTION Normally be used at the end of the track to stop trains. ...