This plastic disc is mainly used for the E14 plastic lamp holder series. It is used as a lampshade tray together with the plastic caps.
Black
White
E14 Plastic Full Thread Lampholder
E14 Plastic Smooth Lampholder
E14 Plastic Half Thread Lampholder
E14 Plastic Insulating Cap
E14 Plastic Shade Ring
E14 Plastic Round Disc with Cap
E14 Plastic Dome Assembly