Vintage Lamp Base beautifully enhances ceramic and glass lamps. The quality is evident. This very decorative lamp base is substantially made of cast brass. It has intricate detail displaying paw feet. The brass has been left unfinished. Natural brass can either be polished to a bright shiny finish or darkened to an antique finish. Use this reproduction lamp base on new or old lamps. Center slips 1/8 IP. Most lamp bodies with a 4" fitter base, will seat around top raised diameter, provided glass opening is at least 3-5/8"