Lampshade Reducing Ring Plastic [LRR-C-P PLU68328]
This Plastic Lampshade Reducing Ring is ideal if you have a lampshade with a 40mm hole and need to fit it to a lampholder like a BC type that is designed for a 29mm shade.
With a 29mm inside diameter that will clip onto the shade and hold it in place when used with the lampholder shade rings screw in place.
Outside Diameter: 40mm
Internal Diameter: 28mm