For auction I have a set of 3 Brass 4" Fitter, Shade Holder Rings For Table Lamp/Chandelier Restoration. They come with the original patina and are in like new condition. Just what your looking for to restore that antique chandelier or light fixture. The center hole looks to be 3/8". Look over my photos as they are part of my description and email me if you have any questions. Thank you for looking and good luck bidding.