Features: Plastic MaterialPackage includes 12pcs E14 lampshade reducer rings and they are made of sturdy hard plastic, durable and heat resistant. Dimension DetailsThe size is about 4.3x2.9x1cm/1.69x1.14x0.39inch (outer diameter x inner diameter x height). Please pay attention to measuring the size of your bulbs round head and select the right type of reducer ring. Main FunctionThe adapter rings convert European and China mainland lampshades to UK lamp holder size, helping to adapt to different lamp holder sizes. Easy InstallationReplacements for your broken lamp holder rings, they are easy to use without any tools, and the installation can be completed in a few seconds. Wide ApplicationThis product is suitable for different types of round head bulbs, widely used in table lamps, desk lamps, floor lamps, panel lamps, bedside lamps, etc. Specification: Material: Plastic Color: White Size: (Approx)(ODxIDxH) 4.3x2.9x1cm/1.69x1.14x0.39inch Package includes: 12pcs x Lampshade reducer rings Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.