10" Glass Student Shade Holders have a 2-13/16" center ring to fit many Central Draft & Rayo Burners. 3 arms extend to hold 10" student lamp shades in place.
Measure
Select according to center ring diameter.
Burner type determines size.
If unsure of burner type: measure diameter of burner ridge, where chimney sits.
Install Glass Shade Holder
Slip shade-holder-center-ring over lamp burner and inside burner tines
Press tightly down onto lamp burner squeezing edges of ring tightly onto burner