Solid brass ORNATELY FENCED 4-INCH BALL SHADE HOLDER FOR Center Draft BURNER: This fancy solid brass holder supports a 4-inch bottom ball shade. The embossed fence acts as an ornate collar that will surround the ball shade's lower lip. The center hole fits on a Center Draft burner as is found in GWTW (Gone-with-the-Wind) type lamps, such as Rayo, Royal, Bradley & Hubbard, and E. Miller.