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Material: Nickel Plated Brass
Center Hole: 2-13/16"
Fits #2 Nickel Oil or electric burner
10" Glass Student Shade Holders have a 2-13/16" center ring to fit appropriate new and antique lamp burners. The center ring sits down on burner, fitting snugly inside lamp burner prongs. 3 arms extend to hold 10" student lamp shades in place. Use with oil and electric lamp burners.