7-INCH TRIPOD FOR OLD #2 BURNER: This tripod supports a shade having a 7-inch bottom diameter and rests on a brass-plated steel or solid brass #2 burner - its center ring has a 2-11/16" diameter.(It will NOT fit a NEW solid brass burner that takes a 2-9/16" center ring.) Check your burner with a refrigerator magnet to see if it is plated steel. The arms of the tripod are brass plated steel. The center ring is solid brass.