Bi-Directional Light Emiting Diodes (LEDs) - 1/8" 3mm Diameter -- Red/Green - 2 Leg Style pkg(5)

Micro Mini Light Emiting Diodes (LEDs) - 1/16" 1.5mm Diameter -- Yellow pkg(12)

16 Gauge Flexible Single Stranded Conductor Wire - 50' -- Blue

8-Ohm Speakers -- 7/8" 22.2mm Round x 5/16" 7.9mm High (Fits HO, O, G & 1 Scales)