It has a 2 & 1/16 center hole. I have restored lamps for years and have other neat parts and adapters on my other auctions.Ask for, or check our auctions, for other lamp restoration parts. We work very hard to keep our customers happy! The item "GENUINE ALADDIN 10 inch Brass Ring Shade Holder fits alladin oil kerosene lamp" is in sale since Friday, October 23, 2015. This item is in the category "Collectibles\Lamps, Lighting\Lamps\ Non-Electric\Oil". The seller is "macdog1" and is located in Hulbert, Oklahoma. This item can be shipped worldwide.