10-INCH TRIPOD FOR CENTER DRAFT BURNER: This tripod supports a shade having a 10-inch bottom diameter and rests on a solid brass 4-prong center draft burner, such as Royal, Bradley & Hubbard and other "Gone-with-the-Wind" (GWTW) style lamps. The arms are brass plated steel. The center ring is solid brass (2-13/16 inch inside diameter).