Features:

Brand new. Perfect for Railway & Building Layout!
2-light vertical block signal Heads. With green & red LED's.
They are unsoldered, you need to solder them yourself.
These LEDs are suitable for use at supply voltages of 3V only.
DO NOT use them on 12V or 16V directely to avoid damaging the LED.
You must connect a resistor in series before you will use them on 12V or 16V, I will supply compatible resistors for free.
Specifications:

Brand:evemodel.
Size: Please see the picture.
Reference Scale: 1:76~1:100,Suitable for OO HO TT scale.
Operating Voltage: 3V, AC or DC Compatible.
Operating Current: 20mA.
Material: Plastic.
Package included:

10pcs signal Heads & 10pcs 3mm Green leds & 10pcs 3mm Red leds.
10pcs Resistors (not pre-soldered) for 9~18V operation.