I ordered these for two old bathroom faucets whose ceramic sockets have expanded significantly over time from heat. I am very happy with the fit. I was able to screw these rings in completely so that they hold the glass shades very firmly. The tan ceramic/plastic lampshades I had previously ordered didn't work and I was afraid I would have to replace the lampholders which would not be easy for these lights. Those rings saved me from TONS of trouble. These are the ones bought for old fixtures.
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