Lionel 6-14151 Mainline Dwarf Signal

"Mainline Dwarf Signal" with lights change from green to red when trains move through its block.

FEATURES:

• Die-cast metal construction
• Lights change from green to red when trains move through its block
• Lights automatically reset to green when block clears
• 153C Contactor included
• Also works with insulated track section (sold separately)

• Gauge: Traditional O Gauge
• Brand: Lionel
• Dimensions: 3/4? x 3/4? x 1 3/4?