Chrome Balance Ring with 10mm Female thread [9211C]
Chrome balance ring is ideal to use lampholder/ lampshade end of a light and it has grooves to enable you to balance a light fitting.
Sometimes with handmade shades they can be heavier one side this will help you counter balance the offset weight.
Thread: 10mm x 1mm pitch
Ring outer: 42.5mm
Ring inner: 33mm
Material: Chrome plated Brass