Brass Plated Electric Burners No.2 have coarse threads to screw into many 1-3/16" lamp collar openings. Electrified with silver cord, are an inexpensive alternative to using similar burners made of solid brass. Burner includes removable collar with a 1-3/4" opening, which will screw onto many lamps which have glass threads on neck exterior. Collar is included however may not be necessary: if lamp already has a collar and if electrified burner will screw into it.
Please note when screwing lamp burners into collars: