7-INCH TRIPOD FOR #2 BRASS BURNER: This tripod supports a shade having a 7-inch bottom diameter and rests on a solid brass #2 burner. The arms are brass plated steel. The center ring is solid brass. This tripod's center ring is 2-9/16" in diameter and will fit most burners, except old brass plated steel burners & Scovill burners, which take a 2-11/16" center ring.