Light source type LED Color HB2-2 socket Right position About this item Light source H4 9003 wiring harness for car marine motorcycle truck motorhome boat etc. Outer Material: Plastic, Ceramic; Ceramic connector, thick wire, high quality. Robust, very efficient. Heat resistant, no melting. Male and female connectors included. These wires will make your HID/LED headlight/fog light modification easy and convenient. Pre-wired for Plug and Play. No need to modify the stock wires at all. Adjustable terminal locations make this adapter a perfect fit for three terminal, two terminal, rectangular or round sealed beam headlights. Easily converts LED headlights with H4 pinout to H4652, H4656, H4666, H6545 and others.