You will get 5 pcs with the purchase.

3mm LED CBI® Circuit Board Indicator Tri-Level. color Red/Yellow/Green 3MM LEDs Vertical Bar.  I think these are perfect for HO scale Traffic lights!

Features:

• Multiple CBIs form horizontal LED arrays on 4.45mm (0.175”) center-lines. 

• High Contrast, UL 94 V-0 rated, black housing 

• Oxygen index: 29% • Polymer content: PBT, 0.078 g 

• Housing stand-offs facilitate PCB cleaning 

• Solderability per MIL-STD-202F, method 208F 

• LEDs are safe for direct viewing per IEC 825-1, EN-60825-1

W:1/8" 

D:1/2