DELUXE Solid brass ORNATELY FENCED 4-INCH BALL SHADE HOLDER FOR #2 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 #2 burner with 2-3/4" inside diamter: -(any burner that takes a 3" diameter chimney base).