This is a Miniatronics 12-153-03 LEDs Blinker/Flasher 5 mm. Yellow (Pack of 3).
The Blinker/Flasher L.E.D. does not require any special circuitry and is available in both 3mm and 5mm diameters. Add a 5-6 Volt DC power source and the L.E.D. will blink on and off automatically giving a special touch to your layout. Include with each L.E.D. is a limiting resistor allowing you to run the L.E.D. as high as as 5 volts DC. Blinker/Flasher Suberbrite Light Emiting Diodes (LEDs) - 13/64 5mm Diameter - Yellow. Three per package.
Condition: Factory New (C-9) Operational Status:Functional Original Box: Yes (P-9)
Manufacturer: Miniatronics Model Number: 12-153-03 MSRP: $8.00