The Universal Square LED Side Marker Light is a high-visibility clearance lamp engineered for trucks, trailers, RVs, and commercial vehicles. It features an integrated rear socket with high-conductivity copper wiring terminals for low electrical resistance and long-lasting corrosion protection. Designed for straightforward installation on flat surfaces, this waterproof, durable housing delivers bright, energy-efficient illumination to ensure your vehicle remains perfectly visible on the road at night or in low-visibility conditions.