Plastic Bulb Holder Fasteners Washers | Plastic Ring Adaptor | Lamp Washer Black - 1pc - Aliexpress
8 Pieces Lamp Shade Ring Collar Lamp Ring for Shade, Replacement Adapter Ring, Retainer Ring for E26 Light Socket with Diameter 1-1/2 Inches (39 Mm) for Lamp Holder Fixture (Black, White) :
E27 Screw Lampshade Lamp Light Shade Collar Ring Adapter Black 2 Packs : Amazon.co.uk: Lighting
8 Pack Lamp Shade Reducer Ring Converter E27 for Lamp Holder Twist Plastic Lampshade Fitting Washer Adapter Ring (Inner 38mm) White : Amazon.co.uk: Lighting
Light Shade Collar Ring Adaptor E27 / E14 – Vintagelite
Uonlytech Lamp Shade Ring Lamp Shade Collar Ring Light Holder Ring Lock Socket Replacement Adapter Ring for E27 Light Socket Golden : Amazon.co.uk: Lighting
10 X Lamp Shade Adapter Reducer Plate / Washer / Ring Made From Metal ES to BC 5037508003610 | eBay
Pack of 2 Metal Reducer Ring Plate Light Fitting Lampshade Washer Adaptor Converter : Amazon.co.uk: Lighting