Wide diameter ES Shade Ring in Black. This will fit all the plastic ES lampholders like the threaded and half threaded.
Inside diameter is 39mm and the outside is 57mm
Please ensure you order the right quantity as they are sold as single rings. Most of the time if you are fitting to a threaded lampholder you would use 2 and a half threaded would be 1.
Fits the plastic E27 lampholders only.