Our MAXXHAUL 50871 Magnetic Towing Light Kit mounts instantly to any vehicle you are towing. The red brake lights have super-bright ONE LED and are impact-resistant for extra long life. This magnetic towing kit is suitable for towing applications up to 80 in. wide. Included Wiring harness: 4 ft. with flat 4-way trailer connector (female), 20 ft. with flat 4-way trailer connector (male) Light diameter: 4-1/2". Our Magnetic Towing Light Kit is DOT compliant.