The TPHD 4 Inch Tail & Turn Light is a round red incandescent stop light that is designed to fit in a standard 4 inch grommet and uses a standard 3-prong plug. Made in the USA, this light is reliable and durable, ensuring long-lasting performance. With its easy installation and compatibility with standard fittings, it provides a practical solution for your lighting needs. Illuminate your vehicle with this high-quality light that offers safety and functionality.