1Application: H4 9003 headlights wiring harness adapters, Y shaped design, 2 way splitters, can be used for Truck, Pickup LED Wire Cable Plug. 2Fine Workmanship: H4 9003 pigtail connector adapter is made of high grade copper core 18 Awg and a durable nylon socket wiring adapter. 3Rigorous Testing: All components are rigorously inspected and meet the strictest quality standards for stable performance and long service life. 4Plug and Play: Headlight conversion harness is easy to install, simply to replace original connected plugs, for replacing the headlights headlamp sockets. 5Fine Workmanship: Professional manufactured, exquisite workmanship with unique design, ensure stable performance and high reliability.