This is Signal-Stat 2 Terminal Thermal Flasher with a 6 Amp Capacity. Sometimes it's called a Pencil Flasher.
Features and Specifications:
- 6 amp capacity @ 12 VDC
- Includes spade terminals for ease of installation
- Brass housing for corrosion resistance
- Mounts via single screw
- 4" lead wires
- Length is 4"
- Height is 3/4"