O.D.4*300mm e-plating gooseneck with USB,Attractive appearance, perfect bending and strong holding ability O.D.4*300mm e-plating gooseneck with USBXiongda Metal gooseneck offers a large select of flexible steel tubing,steel flex ... ,iron5.Surface:plating zinc, nickel, chrome, bronze, plating black and others 6.Applications:reading lamp, earth lamp, medical equipment, USB lamp, USB, bracket , hose ...