Ball Shade Holders support glass ball shades and gas lampshades with 4" bottom fitters. Use on oil and electric lamp burners. For table lamps, chandeliers and wall sconces. For lamps where shade sits upright, cannot be used for shades which hang down.
Sizing: measure outside diameter of burner ridge, where chimney sits, to determine center ring diameter. Fits many central draft & rayo lamp burners.